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Chapter 2 · Human Reproduction

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#1 SUB 3M

Question

Mention the main reprodutive events in humans.

Answer

The reproductive events in humans include -
(i) Formation of gametes (gametogenesis), i.e., sperms in males and ovum in females,
(ii) Transfer of sperms into the female genital tract (insemination).
(iii) Fusion of male and female gametes (fertilisation).
(iv) Formation of zygote.
(v) Formation and development of blastocyst
(vi) Attachment of blastocyst to the uterine wall (implantation).
(vii) Embryonic development (gestation) and
(viii) Delivery of the baby (parturition).
#2 SUB 🖼 2

Question

Draw a labeled diagram of male pelvis showing reproductive system.

Answer

#3 SUB 3M 🖼 2

Question

Describe the structure of a seminiferous tubule
OR
Explain the internal structure of testes.
OR
Explain the internal structure of Seminiferous tubules in male.

Answer

Structure of testis: Each testis has about 250 compartment called testicular lobules.
Each testicular lobule contains one to three highly coiled seminiferous tubules in which sperms are produced.
Seminiferous tubule: Each seminiferous tubule is lined internally by two types of cells: male germ cells (spermatogonia) and sertoli cells.
Male germ cells :
(i) They are arranged in 4 to 8 layers.
The male germ cells undergo meiotic divisions finally leading to sperm formation.
(ii) Sertoli cells (provide nutrition to the germ cells)
They are placed between developing sperms.
(iii) Leydig cells (interstitial cells)
The regions outside the seminiferous tubules called interstitial spaces, contain small blood vessels and interstitial cells or leydig cells.
Leydig cells synthesise and secrete testicular hormones called androgens.
Other immunologically competent cells are also present in interstitial spaces.
#4 SN 2M

Question

Write a short note on the structure of testes.

Answer

Number : 1 pair of testes in an individual.
(1) Location : The testes are situated outside the abdominal cavity within a pouch called scrotum.
(2) Shape : In adults, each testis is oval in shape.
(3) Size : Length is about 4 to 5 cm and a width of about 2 to 3 cm.
(4) Structure : The testis is covered by a dense covering.
Each testis has about 250 compartments called testicular lobules.
Each lobule contains one to three highly coiled seminiferous tubules in which sperms are produced.
Male hormones androgens also called testosterone are produced in testes.
#5 SUB 2M

Question

Give a brief account of human male external genitalia (Penis).

Answer

The penis is the male external genitalia.
It is made up of special tissue that helps in erection of the penis to facilitate insemination.
The enlarged end of penis called the glans penis is covered by a loose fold of skin called foreskin.
#6 SN 🖼 2

Question

Write a short note on male accessory glands.
OR
What are the component of seminal fluid ?

Answer

There are three accessory glands.
It includes one pair of seminal vesicle, one prostate gland and one pair of bulbourethral gland.
The combined secretions of these glands are responsible for formation of semen.
(1) Seminal vesicle : A pair of seminal vesicle is present near the base of bladder. Vas deferens joins with seminal duct and forms ejaculatory duct.
Seminal fluid is a thick, viscous, fluid, rich in nutrients like fructose, vitamin C, calcium and some enzymes.
It produces 60% fluid of semen.
(2) Prostate gland : The prostate gland, located behind the bladder, produces a milky alkaline secretion, that helps maintain and increase sperm viablity.
The prastate gland opens into the urinogenital tract by several small ducts.
(3) Bulbourethral gland : A pair of bulbourethral glands are located under the prostate gland on either side of the urethra.
Like the prostate gland, it secretes a basic alkaline fluid, which helps in the lubrication of the penis during intercourse. Also, helps the penis to become sticky.
#7 SN 4M 🖼 1

Question

Draw a well labeled diagram of human male reproductive system which is associated with transport of sperms.
OR
Write a short note on male accessory ducts.

Answer

The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens.
The seminiferous tubules of the testis open into the vasa efferentia through rete testis.
The vasa efferentia leaves the testis and open into epididymis located along the posterior surface of each testis.
The epididymis leads to vas deferens that ascends to the abdomen and loops over the urinary bladder.
It receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct.
These ducts store and transport the sperms from the testis to the outside through urethra.
The urethra originates from the urinary bladder and extends through the penis to its external opening called urethral meatus.
#8 SUB 🖼 1

Question

Draw a well labelled diagram representing sectional view of female pelvis showing reproductive system.

Answer

#9 SN 2M

Question

Write a short note on human female ovaries.
OR
Describe female primary sex organ.

Answer

Ovaries are the primary female sex organs.
The ovaries are located one on each side of the lower abdomen.
Each ovary is about 2 to 4 cm in length, 2 cm wide and 1 cm thick.
It is connected to the pelvic wall and uterus by ligaments.
Each ovary is covered by a thin epithelium which encloses the ovarian stroma.
The stroma is divided into two zones – a peripheral cortex and an inner medulla.
Ovary produces the female gamete (ovum) and several steroid hormones (ovarian hormones).
#10 SN 3M

Question

Write a short note on oviduct, associated with ovum transport.
OR
Explain about female accessory ducts.

Answer

The oviducts (fallopian tubes), uterus and vagina constitute the female accessory ducts.
(1) Structure of Oviducts :
Each fallopian tube is about 10-12 cm long.
It extends from the periphery of each ovary to the uterus.
(2) Infundibulum : The part closer to the ovary is the funnel-shaped infundibulum.
(3) Fimbriae : The edges of the infundibulum possess finger-like projections called fimbriae, which help in collection of the ovum after ovulation.
(4) Ampulla : The infundibulum leads to a wider part of the oviduct called ampulla.
(5) Isthmus : The last part of the oviduct, isthmus has a narrow lumen and it joins the uterus.
#11 SUB 🖼 2

Question

Draw a labeled diagram of a section through ovary.

Answer

#12 SN 3M

Question

Write a short note on female external genitalia.

Answer

It includes mons pubis, labia majora, labia minora, hymen, clitoris
(a) Mons Pubis : It is a cushion of fatty tissue covered by skin and pubic hair.
(b) Labia majora : These are fleshy folds of tissue, which extend down from the mons pubis and surround the vaginal opening.
(c) Labia minora : These are paired folds of tissue under the labia majora.
(d) Hymen : The opening of the vagina is often covered partially by a membrane called “hymen”.
(e) Clitoris : It is a tiny finger-like structure which lies at the upper junction of the two
labia minora above the urethral opening.
Clitoris differs from penis due to absence of
reproductive duct.
#13 SUB 4M 🖼 2

Question

Draw a labelled diagram of human female reproductive system and explain uterus / womb.

Answer

Structure of Uterus :
The uterus is single and it is also called womb.
The shape of the uterus is like an inverted pear.
It is supported by ligaments attached to the pelvic wall.
The wall of the uterus has three layers:

(i) Perimetrium : The external thin membranous perimetrium.

(ii) Myometrium : The middle thick layer of smooth muscle, myometrium.

(iii) Endometrium : inner glandular layer called endometrium that lines the uterine cavity.

The endometrium undergoes cyclic changes during menstrual cycle while the myometrium exhibits strong contraction during delivery of the baby.
The uterus opens into vagina through a narrow cervix.
The cavity of the cervix is called cervical canal which along with vagina forms the birth canal.
#14 SUB 🖼 1

Question

With a labelled diagram describe the structure of mammary gland.
OR
Write the structure of mammary gland (Diagram is not required).

Answer

A functional mammary gland is a characteristic of all female mammals.
The mammary glands are paired structures (breasts) that contain glandular tissue and variable amount of fat.
The glandular tissue of each breast is divided into 15-20 mammary lobes containing clusters of cells called alveoli.
The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli.
The alveoli open into mammary tubules.
The tubules of each lobe join to form a mammary duct.
Several mammary ducts join to form a wider mammary ampulla which is connected to lactiferous duct through which milk is sucked out.
#15 SUB 4M

Question

Explain human female reproductive system. (Diagram not required)

Answer

The female reproductive system consists of a pair of ovaries alongwith a pair of oviducts, uterus, cervix, vagina and the external genitalia located in pelvic region.
(i) Ovary : Ovaries are the primary female sex organs that produce the female gamete (ovum) and several steroid hormones (ovarian hormones).
The ovaries are located one on each side of the lower abdomen.
Each ovary is about 2 to 4 cm in length and is connected to the pelvic wall and uterus by ligaments.
Each ovary is covered by a thin epithelium which encloses the ovarian stroma.
The stroma is divided into two zones – a peripheral cortex and an inner medulla.
(ii) Oviduct : The fallopian tubes, uterus and vagina constitute the female accessory ducts.
Each fallopian tube is about 10-12 cm long and extends from the periphery of each ovary to the uterus (Figure 2.3b), the part closer to the ovary is the funnel-shaped infundibulum.
The edges of the infundibulum possess finger-like projections called fimbriae, which help in collection of the ovum after ovulation.
The infundibulum leads to a wider part of the oviduct called ampulla.
The last part of the oviduct, isthmus has a narrow lumen and it joins the uterus.
(iii) Uterus : The uterus is single and is also called womb.
The shape of the uterus is like an inverted pear. It is supported by ligaments attached to the pelvic wall.
The uterus opens into vagina through a narrow cervix.
The cavity of the cervix is called cervical canal which alongwith vagina forms the birth canal.
The wall of the uterus has three layers of tissue.
The external thin membranous perimetrium, middle thick layer of smooth muscle, myometrium and inner glandular layer called endometrium that lines the uterine cavity.
The endometrium undergoes cyclic changes during menstrual cycle while the myometrium exhibits strong contraction during delivery of the baby.
(iv) External genitalia : The female external genitalia include mons pubis, labia majora, labia minora, hymen and clitoris.
#16 SN 2M 🖼 2

Question

Write a short note on sperm (With a labelled diagram).
OR
Draw a labelled diagram of sperm.

Answer

The sperm is a microscopic structure composed of a head, neck, a middle piece and a tail.
A plasma membrane envelops the whole body of sperm.
(i) Head : The sperm head contains an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome.
The acrosome is filled with enzymes that helps in fertilisation with the ovum.
(ii) Middle Piece : The middle piece possesses numerous mitochondria, which produce energy for the movement.
(iii) Tail : Tail that facilitate sperm motility essential for fertilisation.
The human male ejaculates about 200 to 300 million sperms during a coitus, of which, for normal fertility, at least 60 per cent sperms must have normal shape and size and at least 40 per cent of them must show vigorous motility.
#17 SUB 🖼 1

Question

Write two major functions each of testis and ovary.

Answer

Functions of testis :
(1) Testis produces spermatozoa which are male gametes.
(2) In testis, the male sex hormone testosterone is produced.
Functions of ovary :

(1) The ovary produces ovum by the process of oogenesis.

(2) Graafian follicles in the ovary produce a female sex hormone called estrogen.

#18 SUB 🖼 2

Question

Draw a labeled diagram of a Graafian follicle.

Answer

#19 SUB 2M 🖼 1

Question

How spermiogenesis and spermiation differ from each other?
OR
Define spermiogenesis and spermiation.

Answer

Spermiogenesis : It is a process by which spermatids are transformed into spermatozoa or mature sperm cells.
Spermiation : It is the process of releasing spermatozoa from the seminiferous tubules.
#20 SN 4M 🖼 3

Question

What is spermatogenesis? Briefly describe the process of spermatogenesis.
OR
Write a short note on hormonal regulation of spermatogenesis.
OR
Explain the structure of sperm and define spermiogenesis and spermiation.
OR
Name the hormones involved in regulation of spermatogenesis.
OR
Explain the process of spermatogenesis
(Diagram is not required).
OR
According to spermatogenesis
(i) Development of sperm from primary spermatocytes. Explain it.
(ii) Role of hormones which are secreted from anterior part of pituitary gland.
(iii) Structure of sperm (Diagram is not necessary)

Answer

Spermatogenesis is a process by which mature sperm cells are produced from immature male germ cells (spermatogonia) in testes. It begins at puberty.
There are following three steps in the formation of spermatids from spermatogonia.
The spermatogonia (sing. spermatogonium) are present on the inner wall of seminiferous tubules.
(1) Proliferative Phase : They multiply by mitotic division and increase in number.
Each spermatogonium is diploid and contains 46 chromosomes.
Some of the spermatogonia called primary spermatocytes, periodically undergo meiosis.
(2) Growth Phase : Some of the spermatogonia increase in size by accumulating nourishing materials from the germinal cells and are called primary spermatocyte.
(3) Maturation Phase : A primary spermatocyte completes the first meiotic division (reduction division) leading to formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each.
The secondary spermatocytes undergo the second meiotic division to produce four equal, haploid spermatids. The number of chromosome in each spermatid is 23.
The middle part of the sperm contains thousands of mitochondria providing energy for movement.
Effect of hormone : Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH). This is a hypothalamic hormone.
The increased levels of GnRH then act at the anterior pituitary gland and stimulate secretion of two gonadotropins – luteinising hormone (LH) and follicle stimulating hormone (FSH).
LH : LH acts at the Leydig cells and stimulates synthesis and secretion of androgens. Androgens, in turn, stimulate the process of spermatogenesis.
FSH : FSH acts on the Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis.
Spermiogenesis : The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis.
Mature sperm contains head, neck, middle part & tail.
Sperm contains haploid nucleus, which has anterior cap like structure (acrosome), rich in enzyme and helps in the fertilisation with ovum.
After spermiogenesis, sperm heads become embedded in the sertoli cells, and are finally released from the seminiferous tubules by the process called spermiation.
#21 SUB 4M 🖼 1

Question

What is oogenesis? Give a brief account of oogenesis. (Chart is required).
Explain oogenesis up to development of primary follicle & ovulation with chart / without chart.
OR
Explain the development of mature gamete in female.

Answer

The process of formation of a mature female gamete is called oogenesis.
It is initiated during the embryonic development stage when a couple of million gamete mother cells (oogonia) are formed within each fetal ovary; no more oogonia are formed and added after birth.
These cells (oogonia) start dividing and enter into prophase-I of the meiotic division and get temporarily arrested at that stage, called primary oocytes.
Each primary oocyte then gets surrounded by a layer of granulosa cells and is called the primary follicle. A large number of these follicles degenerate during the phase from birth to puberty. Therefore, at puberty only 60,000 - 80,000 primary follicles are left in each ovary.
At puberty, the primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles.
The secondary follicle soon transforms into a tertiary follicle which is characterised by a fluid filled cavity called antrum. The theca layer is organised into an inner theca interna and an outer theca externa.
It is at this stage that the primary oocyte within the tertiary follicle grows in size and completes its first meiotic division. It is an unequal division resulting in the formation of a large haploid secondary oocyte and a tiny first polar body.
The secondary oocyte retains bulk of the nutrient rich cytoplasm of the primary oocyte.
The tertiary follicle further changes into the mature follicle or Graafian follicle.
The secondary oocyte forms a new membrane called zona pellucida surrounding it.
The Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation.
During fertilisation, sperm fuses with secondary Oocyte which stimulates its division, releasing secondary polar body.
#22 SUB 2M ▦ 1

Question

Can you identify major differences between oogenesis and spermatogenesis?

Answer

Spermatogenesis

Oogonesis

Spermatogenesis starts at Puberty and continues till death.

(1)

Oogenesis is initiated during the embryonic development stage and get temporarily arrested, then at puberty starts again, till menopause it continues.

(1)

It is continuous process forming millions of sperms.

(2)

From puberty to menopause, every month one egg is released.

(2)

Primary spermatocyte forms in proliferative phase.

(3)

Primary oocyte forms in proliferative phase.

(3)

After meiosis, Primary spermatocyte gives rise to four equal sized spermatids.

(4)

Primary oocyte undergoes meiosis and give rise to one larger secondary oocyte and smaller polar body.

(4)

This process remains continue (after first meiosis).

(5)

This process remains inhibited till the fertilization (after first meiosis).

(5)

Spermiogenesis is seen.

(6)

Metamorphosis is not seen.

(6)

Sperm contains tail for the mobility in reproductive tract.

(7)

Egg does not contain any locomotory structure like tail.

(7)
#23 SUB 2M

Question

Human female experience two major events during her life. Describe these two events.
(1) Menarche (2) Menopause

Answer

Menstruation begins between 10 – 15 years of age in women, it is called menarche.
A women's menstual cycle ends around the age of 50 called menopause.
(1) Onset of menstruation (Menarche):
The onset of menstruation indicates that the female reproductive system has matured and is ready to conceive.
The ovary has the capacity to produce mature ovum.
They are well developed lead to fertilisation of ovum with sperm.
(2) Cessation of menstruation (Menopause):
This process occurs around the age of 50.
The release of mature ovum is inhibited.
The level of sex hormone also decreases.
Even the uterus is not capable of fetal growth and development.
#24 SUB 🖼 1

Question

Name the functions of the following :
(a) Corpus luteum (b) Endometrium
(c) Acrosome (d) Sperm tail (e) Fimbriae

Answer

(a) Corpus luteum - It secretes progesterone. Progesterone is essential for the maintenance of the endometrium.
(b) Endometrium - Implantation of the fertilised ovum and many events of pregnancy take place in the endometrium.
(c) Acrosome - It is filled with enzymes that hydrolyze egg membrane, thus, helping the sperm in penetration of ovum during fertilisation of the ovum.
(d) Sperm tail -  It provides motility to sperm.
(e) Fimbriae - After ovulation, fimbriae helps in the collection of the ovum.
#25 SUB

Question

Identify True/False statements. Correct each false statement to make it true.

Options

  1. (A) Androgens are produced by Sertoli cells.

Answer

False. Androgens are produced by Leydig's cells
(b) Spermatozoa get nutrition from sertoli cells.
Ans. True.
(c) Leydig cells are found in the ovary.
Ans. False. Leydig cells are found out side the seminiferous tubules of the testis (Intertitial space).
(d) Leydig cells synthesize androgens.
Ans. True.
(e) Oogenesis takes place in the corpus luteum.
Ans. False. Oogenesis takes place in the ovary.
(f) Menstrual cycle ceases during pregnancy.
Ans. True.
(g) Presence or absence of a hymen is not a reliable indicator of virginity or sexual experience.
Ans. True.
#26 SUB 🖼 1

Question

Write a brief note on menstrual cycle in detail. (Diagram is not required)
OR
Explain the cyclic reproductive events that only occurs in female of primates. (Diagram is not required)

Answer

In human females, menstruation is repeated at an average interval of about 28/29 days, and the cycle of events starting from one menstruation till the next one is called the menstrual cycle.
The first menstruation begins at puberty and is called menarche.
The changes in the ovary and the uterus endometrium are induced by changes in the levels of pituitary secretion of gonadotropin hormones.
Menstrual cycle is well understood by taking a cycle of 28 days which can be divided into three main phases.
(i) Menstrual phase (1 - 5 days):
The cycle starts with this phase, when menstrual flow occurs and it lasts for 3-5 days.
The menstrual flow results due to breakdown of endometrial lining of the uterus and its blood vessels which forms liquid that comes out through vagina.
Menstruation only occurs if the released ovum is not fertilised.
Lack of menstruation may be indicative of pregnancy.
However, it may also be caused due to some other underlying causes like stress, poor health etc.
(ii) Follicular phase / Proliferative phase
(Day 6 - 14):
The menstrual phase is followed by the follicular phase.
During this phase, the primary follicles in the ovary grow to become a fully mature Graafian follicle and simultaneously the endometrium of uterus regenerates through proliferation.
These changes in the ovary and the uterus are induced by changes in the levels of pituitary and ovarian hormones.
The secretion of gonadotropins (LH and FSH) increases gradually during the follicular phase, and stimulates follicular development as well as secretion of estrogens by the growing follicles.
(iii) Ovulatory phase (Day 14):
Both LH and FSH attain a peak level in the middle of cycle (about 14th day).
Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge induces rupture of Graafian follicle and thereby the release of ovum (ovulation).
(iv) Luteal phase / Secretory phase (Day 15-28):
The ovulation (ovulatory phase) is followed by the luteal phase during which the remaining parts of the Graafian follicle transform into the corpus luteum.
The corpus luteum secretes a large amount of progesterone which is essential for maintenance of the endometrium. Such an endometrium is necessary for implantation of the fertilised ovum and other events of pregnancy.
During pregnancy all events of the menstrual cycle stop and there is no menstruation.
#27 SN 2M 🖼 1

Question

Write a short note on fertilisation (Till the formation of zygote).

Answer

The process of fusion of a sperm with an ovum is called fertilisation.
The fusion of sperm and ovum takes place at ampullary isthmus junction in oviduct.
During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms. Thus, it ensures that only one sperm can fertilise an ovum.
The secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane. This induces the completion of the meiotic division of the secondary oocyte.
The second meiotic division is also unequal and results in the formation of a second polar body and a haploid ovum (ootid).
Soon the haploid nucleus of the sperms and that of the ovum fuse together to form a diploid zygote.
#28 SUB 3M 🖼 1

Question

Explain - the sex of the baby is determined by the father and not by the mother.
OR
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?

Answer

The sex of the baby has been decided after completion of fertilisation.
The chromosome pattern in the human female is XX and in the male is XY.
All the haploid gametes (ova) produced by the female have the sex chromosome X whereas, in the male gametes (sperms) the sex chromosome could be either X or Y, hence, 50 per cent of sperms carry the X chromosome while the other 50 per cent carry the Y.
After fusion of the male and female gametes the zygote would carry either XX or XY depending on whether the sperm carrying X or Y fertilised the ovum.
The zygote carrying XX would develop into a female baby and XY would form a male.
That is why, scientifically it is correct to say that the sex of the baby is determined by the father and not by the mother.
#29 SUB 2M

Question

What is placenta? Give its importance.

Answer

Placenta is a structural and functional unit between developing embryo (foetus) and maternal body.
(1) The chorionic villi and uterine tissue become interdigitated with each other and jointly form placenta.
(2) The placenta is connected to the embryo through an umbilical cord which helps in the transport of substances to and from the embryo.
Importance: The placenta facilitate the supply of oxygen and nutrients to the embryo and also removal of carbon dioxide and excretory/waste materials produced by the embryo.
Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progesterone, etc.
#30 SUB 4M 🖼 1

Question

Explain implantation and embryonic development.

Answer

After implantation, (attachment of developing embryo to the uterine wall) finger-like projections appear on the trophoblast called chorionic villi which are surrounded by the uterine tissue and maternal blood.
The placenta is connected to the embryo through an umbilical cord which helps in the transport of substances to and from the embryo.
The placenta facilitate the supply of oxygen and nutrients to the embryo and also removal of carbon dioxide and excretory/waste materials produced by the embryo.
Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progesterone, etc.
In the later phase of pregnancy, a hormone called relaxin is also secreted by the ovary.
hCG, hPL and relaxin are produced in women only during pregnancy.
During pregnancy, the levels of other hormones like estrogens, progesterone, cortisol, prolactin, thyroxine, etc., are increased several-folds in the maternal blood.
Increased production of these hormones is essential for supporting the fetal growth, metabolic changes in the mother and maintenance of pregnancy.
Embryonic development :
Immediately after implantation, the inner cell mass (embryo) differentiates into an outer layer called ectoderm and an inner layer called endoderm.
A mesoderm soon appears between the ectoderm and the endoderm.
These three layers give rise to all tissues (organs) in adults.
The inner cell mass contains certain cells called stem cells which have the potency to give rise to all the tissues and organs.
The human pregnancy lasts 9 months.
In human beings, after one month of pregnancy, the embryo’s heart is formed. The first sign of growing foetus may be noticed by listening to the heart sound carefully through the stethoscope.
By the end of the second month of pregnancy, the foetus develops limbs and digits.
By the end of 12 weeks (first trimester), most of the major organ systems are formed, for example, the limbs and external genital organs are well-developed.
The first movements of the foetus and appearance of hair on the head are usually observed during the fifth month.
By the end of about 24 weeks (end of second trimester), the body is covered with fine hair, eyelids separate, and eyelashes are formed.
By the end of nine months of pregnancy, the foetus is fully developed and is ready for delivery.
#31 SUB 4M 🖼 1

Question

The zygote passes through several developmental stages till implantation, describe each stage briefly with suitable diagrams.

Answer

The zygote is formed at the ampullary-isthmus junction of the fallopian tube when the union of secondary oocyte and spermatozoa occurs. The zygote undergoes various divisions and changes before it reaches the uterus for implantation.
The figure shows the various stages of development of a zygote as it passes through the oviduct and uterus: 
(a) The zygote divides into a two-celled stage via division or 1st cleavage while the zygote is still in the isthmus of the oviduct.
(b) Several more mitotic divisions or cleavages occur in the 2 celled stage to form a 2, 4, 8 and finally a 16-celled stage of the zygote. The 16 celled stage is called the morula and various cells formed after cleavage are called blastomeres.
(c) Morula then changes into a blastocyst after a few more divisions and this stage contains a fluid filled cavity in the embryo. The blastomeres become arranged and line up into an outer layer of cells called the trophoblast and an inner mass of cells. The fluid filled cavity is called blastocoel.
(d) Implantation of the embryo occurs at this blastocyst stage by the help of trophoblast layer which embeds itself into the uterine endometrium.
#32 SUB 🖼 1

Question

What is parturition? Which hormones are involved in induction of parturition?
OR
Explain parturition and lactation.

Answer

Parturition is the process of giving birth to a baby as the development of the foetus gets completed in the mother’s womb.
The hormones involved in this process are oxytocin and relaxin.
Oxytocin leads to the contraction of smooth muscles of myometrium of the uterus, which directs the full term foetus towards the birth canal.
Effects of hormones :
(1) Oxytocin : Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta which induce mild uterine contractions called foetal ejection reflex.
This triggers release of oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin.
(2) Relaxin :
On the other hand, relaxin hormone causes relaxation of the pelvic ligaments and prepares the uterus for child birth.
The stimulatory reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and stronger contractions. This leads to expulsion of the baby out of the uterus through the birth canal – parturition.
Soon after the infant is delivered, the placenta is also expelled out of the uterus.
#33 SUB 2M

Question

Why do doctors recommend breastfeeding during the initial period of infant growth?

Answer

Lactation :
The mammary glands of the female undergo differentiation during pregnancy and start producing milk towards the end of pregnancy by the process called lactation. This helps the mother in feeding the newborn.
The milk produced during the initial few days of lactation is called colostrum which contains several antibodies absolutely essential to develop resistance for the new-born babies.
Colostrum contains many antibodies which has mainly IgA.
Breast-feeding during the initial period of infant growth is recommended by doctors for bringing up a healthy baby.
#34 FB 1M

Question

Fill in the blanks:

Options

  1. (A) Humans reproduce_______ (asexually/sexually)

Answer

Sexually
(b) Humans are _________ (oviparous, viviparous, ovoviviparous)
Ans. Viviparous
(c) Fertilisation is _______ in humans (external/internal)
Ans. Internal
(d) Male and female gametes are _________ (diploid/haploid)
Ans. Haploid
(e) Zygote is _________ (diploid/haploid)
Ans. Diploid
(f) The process of release of ovum from a mature follicle is called _________ .
Ans. Ovulation
(g) Ovulation is induced by a hormone called _____ .
Ans. LH
(h) The fusion of male and female gametes is called _______ .
Ans. Fertilisation
(i) Fertilisation takes place in _________ .
Ans. Ampullary region of oviduct
(j) Zygote divides to form _________ which is implanted in uterus.
Ans. Blastocyst
(k) The structure which provides vascular connection between foetus and uterus is called _________ .
Ans. Placenta
#35 SUB 🖼 1

Question

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?

Answer

One ovum is released by a human ovary in a month. Identical twins are developed from a single egg. Hence, only one egg would have been released when the mother gave birth to identical twins. If the twins are fraternal then they must have been developed from two eggs.
#36 SUB 🖼 1

Question

What are the major functions of male accessory ducts and glands?

Answer

(1) Male accessory ducts include vasa efferentia, epididymis. vas deferens and rete testis. They transport and temporarily store spermatozoa.
(2) Male accessory glands include seminal vesicles, bulbourethral gland, and prostate gland. These glands secrete fluids that lubricate the female reproductive system and sperms.
#37 SUB 2M 🖼 1

Question

Write two major functions each of testis and ovary.

Answer

Testis :
(i) Produce sperms by process of spermatogenesis.
(ii) Produce male sex-hormone testosterone.
Ovary :
(i) Produce ovum by oogenesis.
(ii) Produce female sex-hormone such as estrogen and progesterone.
#38 SUB 🖼 1

Question

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

Answer

Dogs are species which has poly ovulatory where one ovary releases more than one ovum at the time of ovulation.
Therefore six eggs were released by the ovary of a female dog which gave birth to the six puppies.
S type: 228 Q ⤓ Export ZIP
#39 MCQ 1M

Question

Choose the incorrect statement from the following :

Options

  1. (A) In birds and mammals, internal fertilisation takes place.
  2. (B) Colostrum contains antibodies and nutrients.
  3. (C) Polyspermy in mammals is prevented by the chemical changes in the egg surface.
  4. (D) In humans, female implantation occurs almost seven days after fertilisation.

Answer

(C) Polyspermy in mammals is prevented by the chemical changes in the egg surface.

#40 MCQ 1M

Question

Identify the correct statement from the following:

Options

  1. (A) High levels of estrogen trigger the ovulatory surge.
  2. (B) Oogonial cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards.
  3. (C) Sperms released from seminiferous tubules are highly motile.
  4. (D) Progesterone level is high during the post-ovulatory phase of the menstrual cycle.

Answer

(D) Progesterone level is high during the post-ovulatory phase of the menstrual cycle.

#41 MCQ 1M

Question

Spot the odd one out from the following structures with reference to the male reproductive system:

Options

  1. (A) Rete testis
  2. (B) Epididymis
  3. (C) Vasa efferentia
  4. (D) Isthmus

Answer

(D) Isthmus

#42 MCQ 1M

Question

Seminal plasma, the fluid part of semen, is contributed by
i. Seminal vesicle ii. Prostate gland
iii. Urethra iv. Bulbourethral gland

Options

  1. (A) i and ii
  2. (B) i, ii and iv
  3. (C) ii, iii and iv
  4. (D) i and iv

Answer

(B) i, ii and iv

#43 MCQ 1M

Question

Spermiation is the process of release of sperms from:

Options

  1. (A) Seminiferous tubules
  2. (B) Vas deferens
  3. (C) Epididymis
  4. (D) Prostate gland

Answer

(A) Seminiferous tubules

#44 MCQ 1M

Question

Mature Graafian follicle is generally present in the ovary of a healthy human female around:

Options

  1. (A) 5 – 8 day of menstrual cycle
  2. (B) 11 – 17 day of menstrual cycle
  3. (C) 18 – 23 day of menstrual cycle
  4. (D) 24 – 28 day of the menstrual cycle

Answer

(B) 11 – 17 day of menstrual cycle

#45 MCQ 1M

Question

The acrosomal reaction of the sperm occurs due to:

Options

  1. (A) Its contact with zona pellucida of the ova.
  2. (B) Reactions within the uterine environment of the female.
  3. (C) Reactions within the epididymal environment of the male.
  4. (D) Androgens produced in the uterus.

Answer

(A) Its contact with zona pellucida of the ova.

#46 MCQ 1M

Question

Which one of the following is not a male accessory gland?

Options

  1. (A) Seminal vesicle
  2. (B) Ampulla
  3. (C) Prostate gland
  4. (D) Bulbourethral gland

Answer

(B) Ampulla

#47 MCQ 1M

Question

The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.

Options

  1. (A) Spermatogonia have 46 chromosomes and always undergo meiotic cell division.
  2. (B) Primary spermatocytes divide by mitotic cell division.
  3. (C) Secondary spermatocytes have 23 chromosomes and undergo second meiotic division.
  4. (D) Spermatozoa are transformed into spermatids.

Answer

(C) Secondary spermatocytes have 23 chromosomes and undergo second meiotic division.

#48 MCQ 1M ▦ 1

Question

Match between the following representing parts of the sperm and their functions and choose the correct option.

Column I

Column II

A

Head

i

Enzymes

B

Middle piece

ii

Sperm motility

C

Acrosome

iii

Energy

D

Tail

iv

Genetic material

Options

  1. (A) A – ii, B – iv, C – i, D – iii
  2. (B) A – iv, B – iii, C – i, D – ii
  3. (C) A – iv, B – i, C – ii, D – iii
  4. (D) A – ii, B – i, C – iii, D – iv

Answer

(B) A – iv, B – iii, C – i, D – ii

#49 MCQ 1M

Question

Which among the following has 23 chromosomes?

Options

  1. (A) Spermatogonia
  2. (B) Zygote
  3. (C) Secondary oocyte
  4. (D) Oogonia

Answer

(C) Secondary oocyte

#50 MCQ 1M

Question

Which of the following hormones is not secreted by human placenta?

Options

  1. (A) hCG
  2. (B) Estrogens
  3. (C) Progesterone
  4. (D) LH

Answer

(D) LH

#51 MCQ 1M

Question

The vas deferens receives duct from the seminal vesicle and opens into urethra as:

Options

  1. (A) Epididymis
  2. (B) Ejaculatory duct
  3. (C) Efferent ductule
  4. (D) Ureter

Answer

(B) Ejaculatory duct

#52 MCQ 1M

Question

Urethral meatus refers to the:

Options

  1. (A) Urinogenital duct
  2. (B) Opening of vas deferens into urethra
  3. (C) The external opening of the urinogenital duct
  4. (D) Muscles surrounding the urinogenital duct

Answer

(C) The external opening of the urinogenital duct

#53 MCQ 1M

Question

Morula is a developmental stage:

Options

  1. (A) Between the zygote and blastocyst
  2. (B) Between the blastocyst and gastrula
  3. (C) After the implantation
  4. (D) Between implantation and parturition

Answer

(A) Between the zygote and blastocyst

#54 MCQ 1M

Question

The membranous cover of the ovum at ovulation is:

Options

  1. (A) Corona Radiata
  2. (B) Zona radiata
  3. (C) Zona pellucida
  4. (D) Chorion

Answer

(C) Zona pellucida

#55 MCQ 1M

Question

Identify the odd one from the following:

Options

  1. (A) Labia minora
  2. (B) Fimbriae
  3. (C) Infundibulum
  4. (D) Isthmus

Answer

(A) Labia minora

#56 MCQ 1M

Question

Which one is a primary sex organ?

Options

  1. (A) Scrotum
  2. (B) Penis
  3. (C) Testis
  4. (D) Prostate gland

Answer

(C) Testis

#57 MCQ 1M

Question

Vasa efferentia connects the ______

Options

  1. (A) Testes with epididymis
  2. (B) Kidneys with cloaca
  3. (C) Testes with urinogenital duct
  4. (D) None of the above

Answer

(A) Testes with epididymis

#58 MCQ 1M

Question

In mammals, failure of testes to descend into scrotum is known as

Options

  1. (A) Paedogenesis
  2. (B) Castration
  3. (C) Cryptorchidism
  4. (D) Impotency

Answer

(C) Cryptorchidism

#59 MCQ 1M

Question

The Scrotum communicates with abdominal cavity through

Options

  1. (A) Urethra
  2. (B) Inguinal canal
  3. (C) Vas deferens
  4. (D) Epididymis

Answer

(B) Inguinal canal

#60 MCQ 1M

Question

The functional unit of testis of a man is...

Options

  1. (A) Uriniferous tubules
  2. (B) Malpighian tubules
  3. (C) Seminiferous tubules
  4. (D) Acini or lobules

Answer

(C) Seminiferous tubules

#61 MCQ 1M

Question

The male accessory glands include:

Options

  1. (A) Prostate gland
  2. (B) Bulbourethral gland
  3. (C) Seminal vesicles
  4. (D) All of above

Answer

(D) All of above

#62 MCQ 1M

Question

In mammals, the testes are located in...

Options

  1. (A) Abdominal cavity
  2. (B) Thoracic cavity
  3. (C) Extra-abdominal cavity
  4. (D) Pericardial cavity

Answer

(C) Extra-abdominal cavity

#63 MCQ 1M

Question

Scrotal sacs of man is connected to the abdominal cavity by

Options

  1. (A) Inguinal canal
  2. (B) Haversian canal
  3. (C) Vagina cavity
  4. (D) Spermatic canal

Answer

(A) Inguinal canal

#64 MCQ 1M

Question

In mammals, the testes are located in scrotal sacs, outside the viscera, because of the-

Options

  1. (A) Presence of urinary bladder
  2. (B) Presence of rectum
  3. (C) Long vas-deferens
  4. (D) Requirement of low temperature for spermatogenesis

Answer

(D) Requirement of low temperature for spermatogenesis

#65 MCQ 1M

Question

The Seminal vesicle is located between:

Options

  1. (A) Prostate and urethra
  2. (B) Prostate and vas-deferens
  3. (C) Prostate and cowper's gland
  4. (D) Vas deferens and testis

Answer

(B) Prostate and vas-deferens

#66 MCQ 1M

Question

Another name for Bulbourethral gland is-

Options

  1. (A) Meibomian gland
  2. (B) Prostate gland
  3. (C) Perineal gland
  4. (D) Cowper’s gland

Answer

(D) Cowper’s gland

#67 MCQ 1M

Question

Which of the following depicts the correct pathway of transport of sperms?

Options

  1. (A) Rete testis → Efferent ductules → Epididymis → Vas deferens
  2. (B) Rete testis → Epididymis → Efferent ductules → Vas deferens
  3. (C) Rete testis → Vas deferens → Efferent ductules → Epididymis
  4. (D) Efferent ductules → Rete testis → Vas deferens → Epididymis

Answer

(A) Rete testis → Efferent ductules → Epididymis → Vas deferens

#68 MCQ 1M

Question

The shared terminal duct of the reproductive and urinary system in the human male is...

Options

  1. (A) Urethra
  2. (B) Ureter
  3. (C) Vas Deferens
  4. (D) Vasa Efferentia

Answer

(A) Urethra

#69 MCQ 1M

Question

The enlarged end of penis is covered by a loose fold of skin is called ________.

Options

  1. (A) Glans penis
  2. (B) Foreskin
  3. (C) Hymen
  4. (D) Urethral meatus

Answer

(B) Foreskin

#70 MCQ 1M

Question

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from-

Options

  1. (A) Testes to Epididymis
  2. (B) Epididymis to Vas deferens
  3. (C) Ovary to Uterus
  4. (D) Vagina to Uterus

Answer

(A) Testes to Epididymis

#71 MCQ 1M

Question

Identify the structure on the basis of the given statement which surrounds the primary sex organ of male reproductive system. "It is responsible for maintaining the low temperature by about 2 - 2.5º C from normal body temperature to mature sperm."

Options

  1. (A) Penis
  2. (B) Scrotum
  3. (C) Ureter
  4. (D) Urethra

Answer

(B) Scrotum

#72 MCQ 1M

Question

Read the following statement and answer the question. “The urethra originates from a structure (called X) and extends through the male external genitalia (called Y which helps in introducing semen into the vagina) to its external opening called urethral meatus. Identify X and Y.

Options

  1. (A) X - Urinary bladder; Y - Penis
  2. (B) X - Vasa efferentia; Y - Penis
  3. (C) X - Ejaculatory duct; Y - Ureter
  4. (D) X - Bulbourethral gland; Y – Ureter

Answer

(A) X - Urinary bladder; Y - Penis

#73 MCQ 1M

Question

Read the following statements (i to iv) and answer the following question.
(i) Each testis has highly coiled 250 compartments called seminiferous tubules.
(ii) Erection of the penis due to the presence of special tissues facilitates insemination.
(iii) Immunologically competent cells are also present in the interstitial spaces of seminiferous tubules.
(iv) Testis lie outside the abdominal cavity in a thin pouch of skin called scrotum.
(v) Bulbourethral gland is a single accessory gland.
How many of the above statements are incorrect?

Options

  1. (A) (i), (ii) and (iii)
  2. (B) (iii) and (v)
  3. (C) (i) and (v)
  4. (D) (ii), (iv) and (v)

Answer

(C) (i) and (v)

#74 MCQ 1M

Question

Which of these is an accessory reproductive gland in male mammals?

Options

  1. (A) Inguinal gland
  2. (B) Prostate gland
  3. (C) Mushroom-shaped gland
  4. (D) Gastric gland

Answer

(B) Prostate gland

#75 MCQ 1M

Question

Which of the following statements is true regarding the male reproductive system?

Options

  1. (A) Sperms are diploid.
  2. (B) It includes testis, accessory ducts and glands, and oviducts.
  3. (C) The scrotum keeps the testes warmer, thus helping it to promote the sperm formation.
  4. (D) Sertoli cells are found in seminiferous tubules and provide nutrition to germ cells.

Answer

(D) Sertoli cells are found in seminiferous tubules and provide nutrition to germ cells.

#76 MCQ 1M

Question

Vasa efferentia are the ductules leading from

Options

  1. (A) Epididymis to urethra
  2. (B) Vas deferens to eppaculatory duct
  3. (C) Vas deferens to epididymis
  4. (D) Testicular lobules to rete testis

Answer

(C) Vas deferens to epididymis

#77 MCQ 1M

Question

If the epididymis is being removed, then what will happen?

Options

  1. (A) Short life span of sperm
  2. (B) Early cross the pathway
  3. (C) Functional maturation is early
  4. (D) Sperm will be incapable for fertilisation

Answer

(D) Sperm will be incapable for fertilisation

#78 MCQ 1M

Question

The low temperature required for spermatogenesis is maintained by:

Options

  1. (A) Location of testis outside abdominal cavity
  2. (B) Scrotum
  3. (C) Penis
  4. (D) More than one option

Answer

(B) Scrotum

#79 MCQ 1M

Question

Which of the following is not a part of male external genitalia?

Options

  1. (A) Glans Penis
  2. (B) Foreskin
  3. (C) Urethral Meatus
  4. (D) Anus

Answer

(D) Anus

#80 MCQ 1M

Question

Epididymis is located in ________ of testis.

Options

  1. (A) Anterior surface
  2. (B) Posteriolateral side
  3. (C) Lateral surface
  4. (D) Anterolateral surface

Answer

(B) Posteriolateral side

#81 MCQ 1M

Question

Which of the following ascends to abdomen?

Options

  1. (A) Epididymis
  2. (B) Vas Deferens
  3. (C) Vasa efferentia
  4. (D) Ejaculatory Duct

Answer

(B) Vas Deferens

#82 MCQ 1M

Question

The seminiferous tubules of the testes open into Vasa efferentia through ________.

Options

  1. (A) Rete Testis
  2. (B) Vas Deferens
  3. (C) Epididymis
  4. (D) Urethera

Answer

(A) Rete Testis

#83 MCQ 1M

Question

Which of the following cells will undergo meiosis?

Options

  1. (A) Sertoli cells
  2. (B) Spermatogonia
  3. (C) Leydig cell
  4. (D) Immunologically competent cells

Answer

(B) Spermatogonia

#84 MCQ 1M

Question

Which of the following is wrong?

Options

  1. (A) Spermatogonia and leydig cells are present in seminiferous tubules.
  2. (B) Small blood vessels are present along with Leydig cells.
  3. (C) Leydig cells secrete Androgens.
  4. (D) Sertoli cells provide nutrition to the germ cell.

Answer

(A) Spermatogonia and leydig cells are present in seminiferous tubules.

#85 MCQ 1M

Question

How many seminiferous tubules will be there per testicular lobule?

Options

  1. (A) 1 to 3
  2. (B) 500
  3. (C) 1000
  4. (D) Maximum

Answer

(A) 1 to 3

#86 MCQ 1M

Question

Male reproductive system of humans has not

Options

  1. (A) A testis only
  2. (B) Accessory Ducts
  3. (C) Glands
  4. (D) External Genitalia

Answer

(A) A testis only

#87 MCQ 1M

Question

By the contraction of the spermatic cord, the testis of man are not taken to the abdominal cavity due to which structure?

Options

  1. (A) Fat bodies and gubernaculum present over the testis
  2. (B) Attachment of testis by gubernaculum to the scrotal sac only
  3. (C) Narrowness of inguinal canal
  4. (D) Both (B) and (C)

Answer

(B) Attachment of testis by gubernaculum to the scrotal sac only

#88 MCQ 1M

Question

Duct System in male helps :

Options

  1. (A) To store the sperms
  2. (B) To transport the sperms from the testis to the outside through urethra.
  3. (C) To secrete hormones
  4. (D) Both (A) and (B)

Answer

(D) Both (A) and (B)

#89 MCQ 1M

Question

The correct sequence of cell stage in spermatogenesis is

Options

  1. (A) Spermatocytes – Spermatids –Spermatogonia – Spermatozoa
  2. (B) Spermatogonia – Spermatids –Spermatocytes – Spermatozoa
  3. (C) Spermatocytes – Spermatogonia –Spermatids – Spermatozoa
  4. (D) Spermatogonia – Spermatocytes –Spermatids – Spermatozoa

Answer

(D) Spermatogonia – Spermatocytes –Spermatids – Spermatozoa

#90 MCQ 1M

Question

Foreskin refers to :

Options

  1. (A) Loose fold of skin over the uterus
  2. (B) Loose fold of skin over the bulbourethral gland
  3. (C) Loose fold of skin over the glans penis
  4. (D) Loose fold of skin over the testicular lobules

Answer

(C) Loose fold of skin over the glans penis

#91 MCQ 1M

Question

Cyclic changes during menstrual cycle is a characteristic of
(i) Myometrium (ii) Perimetrium
(iii) Endometrium

Options

  1. (A) i and ii
  2. (B) i,ii and iii
  3. (C) i and iii
  4. (D) iii only

Answer

(D) iii only

#92 MCQ 1M ▦ 1

Question

Select the correct number of secondary spermatocytes produced by primary spermatocytes

Primary

Secondary

spermatocytes

spermatocytes

(A)

10

10

(B)

10

20

(C)

10

5

(D)

10

40

Answer

(B)

10

20

#93 MCQ 1M

Question

Select the correct statement :

Options

  1. (A) Sperm has plasma membrane over the whole body
  2. (B) Sperm has plasma membrane over the head only
  3. (C) Sperm has plasma membrane over the head and neck
  4. (D) Sperm has plasma membrane till middle piece

Answer

(A) Sperm has plasma membrane over the whole body

#94 MCQ 1M

Question

The ________ levels of GnRH acts at the anterior pituitary gland and stimulates secretion/s of ________ to initiate the process of spermatogenesis.

Options

  1. (A) Increased, luteinising hormone (LH)
  2. (B) Decreased, follicle stimulating hormone (FSH)
  3. (C) Increased, luteinising hormone (LH) and follicle stimulating hormone (FSH)
  4. (D) Decreased, luteinising hormone (LH) and follicle stimulating hormone (FSH)

Answer

(C) Increased, luteinising hormone (LH) and follicle stimulating hormone (FSH)

#95 MCQ 1M ▦ 1

Question

Select the correct set of ploidy in the following

Cell

Ploidy

(A)

Spermatid

2n

(B)

Spermatozoa

2n

(C)

Secondary spermatocyte

n

(D)

Primary spermatocyte

n

Answer

(C)

Secondary spermatocyte

n

#96 MCQ 1M

Question

Interstitial cells in seminiferous tubule are responsible for the secretion of

Options

  1. (A) LH
  2. (B) FSH
  3. (C) Androgen
  4. (D) GnRH

Answer

(C) Androgen

#97 MCQ 1M

Question

Spermatogenesis begins

Options

  1. (A) Before birth
  2. (B) Immediately after birth
  3. (C) At puberty
  4. (D) During 7th month of foetal development

Answer

(C) At puberty

#98 MCQ 1M

Question

Select the correct option about male gamete

Options

  1. (A) 2
  2. (B) 3
  3. (C) 4
  4. (D) 5

Answer

(B) 3

#99 MCQ 1M

Question

Spermatids are formed by

Options

  1. (A) Spermatozoa
  2. (B) Secondary spermatids
  3. (C) Secondary spermatocytes
  4. (D) Spermiation

Answer

(C) Secondary spermatocytes

#100 MCQ 1M

Question

Spermatozoa are nourished during their development by

Options

  1. (A) Sertoli cell
  2. (B) Interstitial cells
  3. (C) Connective tissue cells
  4. (D) Leydig cells

Answer

(A) Sertoli cell

#101 MCQ 1M

Question

The number of spermatozoa, two primary spermatocyte finally produced in spermatogenesis is

Options

  1. (A) 2
  2. (B) 4
  3. (C) 6
  4. (D) 8

Answer

(D) 8

#102 MCQ 1M ▦ 1

Question

Match the column:

Column A

Column B

(Spermatozoa)

(Structure)

A

Head

i

Centriole

B

Neck

ii

Nucleus

C

Middle Piece

iii

Mitochondria

Options

  1. (A) A – i, B – ii, C – iii
  2. (B) A – ii, B – i, C – iii
  3. (C) A – iii, B – ii, C – i
  4. (D) A – i, B – iii, C – ii

Answer

(B) A – ii, B – i, C – iii

#103 MCQ 1M

Question

Seminal plasma, the fluid part of semen, is contributed by:

Options

  1. (A) (i) and (ii)
  2. (B) (i), (ii) and (iv)
  3. (C) (ii), (iii) and (iv)
  4. (D) (i) and (iv)

Answer

(B) (i), (ii) and (iv)

#104 MCQ 1M

Question

Which of the following is not a part of male external genitalia?

Options

  1. (A) Glans penis
  2. (B) Foreskin
  3. (C) Urethral meatus
  4. (D) Anus

Answer

(D) Anus

#105 MCQ 1M

Question

The seminiferous tubules of the testis open into Vasa efferentia through ________.

Options

  1. (A) Rete Testis
  2. (B) Vas Deferens
  3. (C) Epididymis
  4. (D) Urethera

Answer

(A) Rete Testis

#106 MCQ 1M

Question

Which of the following is wrong?

Options

  1. (A) Spermatogonia and Leydig cells are present in seminiferous tubules.
  2. (B) Small blood vessels are present along with leydig cells.
  3. (C) Leydig cells secrete androgens.
  4. (D) Sertoli cell provide nutrition to the germ cell.

Answer

(A) Spermatogonia and Leydig cells are present in seminiferous tubules.

#107 MCQ 1M

Question

Which of the following structures loop over the urinary bladder?

Options

  1. (A) Epididymis
  2. (B) Vas Deferens
  3. (C) Ejaculatory Duct
  4. (D) Urethra

Answer

(B) Vas Deferens

#108 MCQ 1M

Question

Suppose the internal temperature of body is 36.5ºC now, then what will be the temperature required for human spermatogenesis?

Options

  1. (A) 34.2ºC
  2. (B) 33ºC
  3. (C) 38ºC
  4. (D) 38.2ºC

Answer

(A) 34.2ºC

#109 MCQ 1M

Question

Testes of humans are located

Options

  1. (A) Inside abdominal cavity
  2. (B) Within a tunnel like structure
  3. (C) Within Scrotum
  4. (D) More than one option is correct

Answer

(C) Within Scrotum

#110 MCQ 1M

Question

In human males, the testes lie in the scrotum, because it helps in the

Options

  1. (A) Process of mating
  2. (B) Formation of sperm
  3. (C) Easy transfer of gametes
  4. (D) All the above

Answer

(B) Formation of sperm

#111 MCQ 1M

Question

Seminiferous are Tubules lined by which type of cells?

Options

  1. (A) Male sperm cells
  2. (B) Spermatogonia
  3. (C) Sertoli cells
  4. (D) All of these

Answer

(D) All of these

#112 MCQ 1M

Question

Leydig cells are also known as

Options

  1. (A) Male sperm cells
  2. (B) Sertoli Cells
  3. (C) Interstitial cells
  4. (D) Supportive Cells

Answer

(C) Interstitial cells

#113 MCQ 1M

Question

Seminal plasma is rich in all except-

Options

  1. (A) Fructose
  2. (B) Iron
  3. (C) Certain enzymes
  4. (D) Calcium

Answer

(B) Iron

#114 MCQ 1M

Question

Urethral meatus refers to the:

Options

  1. (A) Urogenital duct
  2. (B) Opening of vas deferens into urethra
  3. (C) External opening of the urinogenital duct
  4. (D) Muscles surrounding the urinogenital duct

Answer

(C) External opening of the urinogenital duct

#115 MCQ 1M

Question

The part of the sperm involved in penetrating in the egg membrane is

Options

  1. (A) Tail
  2. (B) Acrosome
  3. (C) Allosome
  4. (D) Autosome

Answer

(B) Acrosome

#116 MCQ 1M ▦ 1

Question

Select the incorrect set of ploidy in the following.

Cell

Ploidy

(A)

Spermatid

n

(B)

Spermatozoa

n

(C)

Secondary spermatocyte

2n

(D)

Primary spermatocyte

2n

Answer

(C)

Secondary spermatocyte

2n

#117 MCQ 1M

Question

A primary spermatocyte completes the first meiotic division leading to the formation of

Options

  1. (A) Two unequal, haploid cells called secondary spermatocytes.
  2. (B) Two equal, haploid cells called spermatid.
  3. (C) Two equal, haploid cells called secondary spermatocytes.
  4. (D) Two unequal, haploid cells called spermatid.

Answer

(C) Two equal, haploid cells called secondary spermatocytes.

#118 MCQ 1M

Question

Spermiation involves the process where

Options

  1. (A) The spermatids are transformed into spermatozoa.
  2. (B) Sperm heads become embedded in the Sertoli cells.
  3. (C) Sperm are finally released from the seminiferous tubules.
  4. (D) Both (B) and (C)

Answer

(D) Both (B) and (C)

#119 MCQ 1M

Question

Androgens help in

Options

  1. (A) Oogenesis
  2. (B) Spermatogenesis
  3. (C) Maturation of Sertoli cells
  4. (D) Both (A) and (B)

Answer

(B) Spermatogenesis

#120 MCQ 1M

Question

Mitochondria are richly present in the

Options

  1. (A) Head of the sperm
  2. (B) Neck of the sperm
  3. (C) Middle piece of the sperm
  4. (D) Tail of the sperm

Answer

(C) Middle piece of the sperm

#121 MCQ 1M

Question

Spermatozoa are nourished during their development by

Options

  1. (A) Sertoli cell
  2. (B) Interstitial cells
  3. (C) Connective tissue cells
  4. (D) Leydig cells

Answer

(A) Sertoli cell

#122 MCQ 1M

Question

Ovary is connected to the uterus by

Options

  1. (A) Tendon
  2. (B) Ligament
  3. (C) Cartilage
  4. (D) Lymph

Answer

(B) Ligament

#123 MCQ 1M

Question

Select the correct statement for middle layer of uterus

Options

  1. (A) Thin membranous and undergoes cyclic changes during menstrual cycle.
  2. (B) Thick membranous and exhibits strong contraction during delivery of the baby.
  3. (C) Thick layer of smooth muscle and undergoes cyclic changes during menstrual cycle.
  4. (D) Thick layer of smooth muscle and exhibits strong contraction during delivery of the baby.

Answer

(D) Thick layer of smooth muscle and exhibits strong contraction during delivery of the baby.

#124 MCQ 1M

Question

Select the correct statement.
Statement 1 : Each ovary is covered by a thin epithelium which encloses the ovarian stroma.
Statement 2 : The stroma is divided into two zones – inner cortex and peripheral medulla.

Options

  1. (A) Statement 1 is correct
  2. (B) Statement 2 is correct
  3. (C) Statement 1 and 2 both are incorrect
  4. (D) Statement 1 and 2 both are correct

Answer

(A) Statement 1 is correct

#125 MCQ 1M

Question

A functional mammary gland is a characteristic of

Options

  1. (A) All female mammals
  2. (B) All mammals
  3. (C) Primates only
  4. (D) All chordates

Answer

(A) All female mammals

#126 MCQ 1M

Question

Which of the following is correct about mammalian testes?

Options

  1. (A) Graafian follicles, Sertoli cells, Leydig’s cells
  2. (B) Graafian follicles, Sertoli cells, Seminiferous tubules
  3. (C) Sertoli cells, Seminiferous tubules, Leydig’s cells
  4. (D) Graafian follicle, Leydig’s cells, Seminiferous tubule

Answer

(C) Sertoli cells, Seminiferous tubules, Leydig’s cells

#127 MCQ 1M

Question

Lower narrow end of uterus is called

Options

  1. (A) Urethra
  2. (B) Cervix
  3. (C) Clitoris
  4. (D) Vulva

Answer

(B) Cervix

#128 MCQ 1M

Question

Which of the following is incorrectly paired with its function?

Options

  1. (A) Epididymis → Maturation and storage of sperms.
  2. (B) Prostate gland → Secretes androgen binding protein and inhibin.
  3. (C) Fallopian tube → Catches ova and conducts them.
  4. (D) Seminal vesicle → Produces a sugar containing fluid to nourish sperms.

Answer

(B) Prostate gland → Secretes androgen binding protein and inhibin.

#129 MCQ 1M

Question

The female reproductive system includes
a. Primary sex organ
b. Accessory duct
c. Accessory glands
d. External genitalia

Options

  1. (A) a, b and d
  2. (B) a, c and d
  3. (C) a and d only
  4. (D) a, b, c and d

Answer

(D) a, b, c and d

#130 MCQ 1M

Question

Birth canal is formed by

Options

  1. (A) Uterus along with vagina
  2. (B) Uterus along with cervix
  3. (C) Cervical canal along with vagina
  4. (D) Uterus, cervix and vagina

Answer

(C) Cervical canal along with vagina

#131 MCQ 1M

Question

The part of fallopian tube closest to the ovary is

Options

  1. (A) Ampulla
  2. (B) Isthmus
  3. (C) Infundibulum
  4. (D) Cervix

Answer

(C) Infundibulum

#132 MCQ 1M

Question

Female accessory ducts include/s

Options

  1. (A) Fallopian tubes
  2. (B) Uterus
  3. (C) Vagina
  4. (D) All of these

Answer

(D) All of these

#133 MCQ 1M

Question

Select the incorrect statement for infundibulum-
i. The part closer to the ovary.
ii. Is the pear-shaped infundibulum
iii. The edges of the infundibulum possess finger-like projections called fimbriae
iv. Fimbriae in infundibulum help in giving of the ovum after ovulation to ovary.

Options

  1. (A) i and ii
  2. (B) ii and iii
  3. (C) i, ii and iv
  4. (D) ii and iv

Answer

(D) ii and iv

#134 MCQ 1M

Question

Perimetrium is

Options

  1. (A) Thick layer of uterus
  2. (B) External layer of uterus
  3. (C) Glandular layer of uterus
  4. (D) All of these

Answer

(B) External layer of uterus

#135 MCQ 1M

Question

Ovarian stroma is covered by

Options

  1. (A) Thin epithelium
  2. (B) Thick epithelium
  3. (C) Loose connective tissue
  4. (D) Dense connective tissue

Answer

(A) Thin epithelium

#136 MCQ 1M

Question

Which among the following are the parts of female external genetilia?

Options

  1. (A) Mons pubis, labia majora, labia minora and cervix
  2. (B) Hymen, clitoris, vagina and cervix
  3. (C) Mons pubis, labia majora, labia minora and vagina
  4. (D) Hymen, clitoris and mons pubis

Answer

(D) Hymen, clitoris and mons pubis

#137 MCQ 1M

Question

The hymen can be torn by
i. First coitus (intercourse)
ii. Sudden fall or jolt
iii. Insertion of vaginal tampon
iv. Active participation in cycling and horseback riding

Options

  1. (A) i
  2. (B) i, iii and iv
  3. (C) i, ii and iii
  4. (D) i, ii, iii and iv

Answer

(D) i, ii, iii and iv

#138 MCQ 1M

Question

The clitoris lies at the upper junction of ________ above the urethral opening.

Options

  1. (A) Labia majora
  2. (B) Labia minora
  3. (C) Mons pubis
  4. (D) Infundibulum

Answer

(B) Labia minora

#139 MCQ 1M

Question

The glandular tissue of each breast is divided into

Options

  1. (A) 10-12 mammary lobes
  2. (B) 15-20 mammary lobes
  3. (C) 23-25 mammary lobes
  4. (D) 25-30 mammary lobes

Answer

(B) 15-20 mammary lobes

#140 MCQ 1M

Question

Which of the following sequences is correct?

Options

  1. (A) Lobes → Mammary Duct → Ampulla → Lactiferous Duct
  2. (B) Alveoli → tubules → Lactiferous Duct → Mammary Ducts
  3. (C) Mammary Ducts → Lactiferous Ducts → Ampulla → Nipple
  4. (D) Mammary lobes → Lactiferous Duct → Mammary duct → Nipple

Answer

(A) Lobes → Mammary Duct → Ampulla → Lactiferous Duct

#141 MCQ 1M

Question

The ________ is folds of fatty tissue which extends down from ________ and surrounds the vaginal opening.

Options

  1. (A) Labia minora, Labia majora
  2. (B) Labia minora, Mons pubis
  3. (C) Labia majora, mons pubis
  4. (D) Labia majora, clitoris

Answer

(C) Labia majora, mons pubis

#142 MCQ 1M

Question

The glandular tissue of each breast is divided into 15-20 mammary lobes have duct called ________.

Options

  1. (A) Mammary duct
  2. (B) Lactiferous duct
  3. (C) Mammary tubules
  4. (D) Ampulla

Answer

(A) Mammary duct

#143 MCQ 1M

Question

Each fallopian tube is about

Options

  1. (A) 10-12 cm long
  2. (B) 5-10 cm long
  3. (C) 18-20 cm long
  4. (D) 25-30 cm long

Answer

(A) 10-12 cm long

#144 MCQ 1M

Question

How many sperms and ova will be produced from 25 primary spermatocytes and 25 primary oocytes respectively?

Options

  1. (A) 50 sperms and 50 ova
  2. (B) 100 sperms and 25 ova
  3. (C) 150 sperms and 100 ova
  4. (D) 200 sperms and 25 ova

Answer

(B) 100 sperms and 25 ova

#145 MCQ 1M

Question

Which layer of uterus undergoes cyclic changes during menstrual cycle?

Options

  1. (A) Myometrium
  2. (B) Endometrium
  3. (C) Perimetrium
  4. (D) All the above

Answer

(B) Endometrium

#146 MCQ 1M

Question

Mammary glands :

Options

  1. (A) Are not paired structure
  2. (B) Do not have glandular tissue
  3. (C) Do not have defined amount of fat
  4. (D) Is not a characteristic of all female mammals

Answer

(C) Do not have defined amount of fat

#147 MCQ 1M

Question

Ovary is not

Options

  1. (A) Covered by thick epithelium to enclose stroma
  2. (B) Having stroma with outer part cortex and inner part Medulla
  3. (C) Each ovary is about 2-4 cm in length
  4. (D) Ovary secretes several steroid hormones.

Answer

(A) Covered by thick epithelium to enclose stroma

#148 MCQ 1M

Question

The ligaments help ovaries to be in place

Options

  1. (A) To form connection with pelvic wall and uterine wall
  2. (B) To form connection with pelvic wall
  3. (C) To form connection with uterine wall
  4. (D) To form connection with ovarian walls

Answer

(A) To form connection with pelvic wall and uterine wall

#149 MCQ 1M

Question

The process of formation of a mature female gamete is called

Options

  1. (A) Ovulation
  2. (B) Oogenesis
  3. (C) Menarche
  4. (D) Both (A) and (B)

Answer

(B) Oogenesis

#150 MCQ 1M

Question

Oogonia get arrested at ________ in female foetus ovary.

Options

  1. (A) Metaphase I
  2. (B) Prophase I
  3. (C) Telophase I
  4. (D) Prophase II

Answer

(B) Prophase I

#151 MCQ 1M

Question

Spermatogenesis and Oogenesis are initiated during the

Options

  1. (A) Puberty and Puberty
  2. (B) At birth and Puberty
  3. (C) At embryonic stage and At birth
  4. (D) At Puberty and Embryonic stage

Answer

(D) At Puberty and Embryonic stage

#152 MCQ 1M

Question

A large number of primary follicles _______during the phase from birth to puberty in females.

Options

  1. (A) Regenerate
  2. (B) Increase
  3. (C) Degenerate
  4. (D) Proliferate

Answer

(C) Degenerate

#153 MCQ 1M

Question

At puberty how many primary follicles are left in each ovary?

Options

  1. (A) 1 million
  2. (B) 60,000 - 80,000
  3. (C) 40,000 - 60,000
  4. (D) 20,000 - 50,000

Answer

(B) 60,000 - 80,000

#154 MCQ 1M

Question

Select the correct statement-
Statement 1 : During the embryonic development stage, a couple of million gamete mother cells (oogonia) are formed within each fetal ovary.
Statement 2 : More oogonia are formed and added after birth.

Options

  1. (A) Statement 1 is correct
  2. (B) Statement 2 is correct
  3. (C) Statement 1 and 2 both are incorrect
  4. (D) Statement 1 and 2 both are correct

Answer

(A) Statement 1 is correct

#155 MCQ 1M

Question

Antrum is...

Options

  1. (A) Solid mass in secondary follicle
  2. (B) Fluid filled cavity in secondary follicle
  3. (C) Solid mass in tertiary follicle
  4. (D) Fluid filled cavity in tertiary follicle

Answer

(D) Fluid filled cavity in tertiary follicle

#156 MCQ 1M

Question

The mature secondary follicle has ________.

Options

  1. (A) Granulosa cells
  2. (B) Graafian cells
  3. (C) Theca layer
  4. (D) Both (A) and (C)

Answer

(D) Both (A) and (C)

#157 MCQ 1M

Question

Select the incorrect statement-

Options

  1. (A) The acrosome is filled with enzymes that help in fertilisation with the ovum.
  2. (B) The middle piece possesses numerous mitochondria, which produce energy for the movement of tail that facilitate sperm motility essential for fertilisation.
  3. (C) The human male ejaculates about 200 to 300 million sperms during implantation.
  4. (D) The sperm head contains an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome.

Answer

(C) The human male ejaculates about 200 to 300 million sperms during implantation.

#158 MCQ 1M

Question

Which is true for oogenesis?

Options

  1. (A) The Grafian follicle ruptures to release the primary oocyte (ovum) from the ovary by the process called ovulation.
  2. (B) First meiotic division is an equal division resulting in the formation of a haploid secondary oocyte and first polar body.
  3. (C) The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles.
  4. (D) Secondary oocyte does not retain bulk of the nutrient rich cytoplasm of the primary oocyte due to equal division.

Answer

(C) The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles.

#159 MCQ 1M

Question

Graafian follicle is formed after...

Options

  1. (A) Primary oocyte
  2. (B) Secondary follicle
  3. (C) Tertiary oocyte
  4. (D) Tertiary follicle

Answer

(D) Tertiary follicle

#160 MCQ 1M

Question

The primary oocyte within the __A__ follicle grows in size and completes its __B__

Options

  1. (A) A. Secondary; B. First mitotic division
  2. (B) A. Tertiary; B. First meiotic division
  3. (C) A. Secondary; B. First meiotic division
  4. (D) A. Tertiary; B. First mitotic division

Answer

(B) A. Tertiary; B. First meiotic division

#161 MCQ 1M

Question

First polar body is formed along with...

Options

  1. (A) Primary oocyte
  2. (B) Secondary oocyte
  3. (C) Tertiary follicle
  4. (D) Secondary follicle

Answer

(B) Secondary oocyte

#162 MCQ 1M

Question

The Graafian follicle ruptures to release the secondary oocyte from the ovary by the process called...

Options

  1. (A) Ovulation
  2. (B) Oogenesis
  3. (C) Implantation
  4. (D) Insemination

Answer

(A) Ovulation

#163 MCQ 1M

Question

During foetal stage primary oocyte gets surrounded by a layer of granulosa cells and is called the ________.

Options

  1. (A) Primary follicle
  2. (B) Secondary oocyte
  3. (C) Tertiary oocyte
  4. (D) Secondary follicle

Answer

(A) Primary follicle

#164 MCQ 1M

Question

Antrum is filled with fluid and is found in

Options

  1. (A) Bone marrow
  2. (B) Cavity of brain
  3. (C) Graafian follicle of ovary
  4. (D) Pericardium of heart

Answer

(C) Graafian follicle of ovary

#165 MCQ 1M

Question

10 oogonia yield 10 primary oocytes, then how many ova are produced on completion of oogenesis?

Options

  1. (A) 5
  2. (B) 10
  3. (C) 20
  4. (D) 40

Answer

(B) 10

#166 MCQ 1M

Question

The menstrual phase is followed by the...

Options

  1. (A) Secretory Phase
  2. (B) Follicular Phase
  3. (C) Proliferative phase
  4. (D) Both (B) and (C)

Answer

(D) Both (B) and (C)

#167 MCQ 1M

Question

The first menstruation begins at puberty and is called

Options

  1. (A) Menarche
  2. (B) Menopause
  3. (C) Parturition
  4. (D) Implantation

Answer

(A) Menarche

#168 MCQ 1M

Question

The menstrual cycle occurs in...

Options

  1. (A) All female mammals
  2. (B) All mammals
  3. (C) Primates only
  4. (D) All chordates

Answer

(C) Primates only

#169 MCQ 1M

Question

LH surge induces ________ in females.

Options

  1. (A) Ovulation
  2. (B) Implantation
  3. (C) Follicular development
  4. (D) Menstruation

Answer

(A) Ovulation

#170 MCQ 1M

Question

The changes in the ovary and the uterus during menstrual cycle are induced by changes in the levels of hormones from-

Options

  1. (A) Anterior Pituitary hormones
  2. (B) Posterior pituitary hormones
  3. (C) Ovaries
  4. (D) Both (A) and (C)

Answer

(D) Both (A) and (C)

#171 MCQ 1M

Question

Ovulatory phase is followed by the...

Options

  1. (A) Secretory Phase
  2. (B) Follicular Phase
  3. (C) Proliferative phase
  4. (D) Both (B) and (C)

Answer

(A) Secretory Phase

#172 MCQ 1M

Question

At what cycle day/s does the luteal phase occur?

Options

  1. (A) Cycle days 15-28
  2. (B) Cycle days 5-13
  3. (C) Cycle day 14
  4. (D) Cycle days 7-14

Answer

(A) Cycle days 15-28

#173 MCQ 1M

Question

Lack of menstruation means

Options

  1. (A) i
  2. (B) i and iii
  3. (C) i, ii and iii
  4. (D) i and ii

Answer

(C) i, ii and iii

#174 MCQ 1M

Question

In the middle of menstrual cycle all hormones are at peak level except-

Options

  1. (A) LH
  2. (B) FSH
  3. (C) Estrogen
  4. (D) Progesterone

Answer

(D) Progesterone

#175 MCQ 1M

Question

Select the incorrect statement:

Options

  1. (A) Remaining parts of the Graafian follicle transform as the corpus luteum.
  2. (B) The corpus luteum secretes large amounts of LH which is essential for maintenance of the endometrium.
  3. (C) An endometrium is necessary for implantation of the fertilised ovum and other events of pregnancy.
  4. (D) During pregnancy all events of the menstrual cycle stop and there is no menstruation.

Answer

(B) The corpus luteum secretes large amounts of LH which is essential for maintenance of the endometrium.

#176 MCQ 1M

Question

Menstruation only occurs if the released ovum is...

Options

  1. (A) Fertilised
  2. (B) Not fertilised
  3. (C) Divides
  4. (D) Undergoes mitotic division

Answer

(B) Not fertilised

#177 MCQ 1M

Question

Ovulation in the human female normally takes place during the menstrual cycle:

Options

  1. (A) At the mid secretory phase
  2. (B) Just before the end of the secretory phase
  3. (C) At the beginning of the proliferative phase
  4. (D) At the end of the proliferative phase

Answer

(D) At the end of the proliferative phase

#178 MCQ 1M

Question

If mammalian ovum fails to get fertilised, then all occurs except:

Options

  1. (A) Corpus luteum will disintegrate
  2. (B) Progesterone secretion rapidly declines
  3. (C) Progesterone secretion increases.
  4. (D) Menstruation

Answer

(C) Progesterone secretion increases.

#179 MCQ 1M

Question

Large amount of progesterone is secreted by

Options

  1. (A) Corpus germinativum
  2. (B) Corpus luteum
  3. (C) Corpus cavernosa
  4. (D) Corpus pellucida

Answer

(B) Corpus luteum

#180 MCQ 1M

Question

If fertilisation does not occur, corpus
luteum ________.

Options

  1. (A) Proliferates
  2. (B) Degenerates
  3. (C) Regenerates
  4. (D) Divides

Answer

(B) Degenerates

#181 MCQ 1M

Question

LH surge:

Options

  1. (A) Is a dramatic sudden increase in the levels of LH during the early part of menstrual cycle and is responsible for ovulation.
  2. (B) Is a dramatic sudden decrease in the levels of LH during the early part of menstrual cycle and is responsible for ovulation.
  3. (C) Is a dramatic sudden decrease in the levels of LH during the mid-menstrual cycle and is responsible for ovulation.
  4. (D) Is a dramatic sudden increase in the levels of LH during the mid-menstrual cycle and is responsible for ovulation.

Answer

(D) Is a dramatic sudden increase in the levels of LH during the mid-menstrual cycle and is responsible for ovulation.

#182 MCQ 1M

Question

Select the correct statement-

Options

  1. (A) During copulation (coitus) semen is released by the penis into the vagina (insemination).
  2. (B) The motile sperms swim rapidly, pass through the cervix, enter into the uterus and finally reach the ampullary region of the fallopian tube.
  3. (C) The ovum released by the ovary is also transported to the ampullary region where fertilisation takes place.
  4. (D) All of these

Answer

(D) All of these

#183 MCQ 1M

Question

Fertilisation can only occur if the ovum and sperms are transported...

Options

  1. (A) Simultaneously to the birth canal
  2. (B) Simultaneously to the cervical region
  3. (C) Simultaneously to the uterus
  4. (D) Simultaneously to the ampullary region

Answer

(D) Simultaneously to the ampullary region

#184 MCQ 1M

Question

Select the correct statement.
Statement 1 : All copulations lead to fertilisation and pregnancy
Statement 2 : The process of fusion of a sperm with an ovum is called fertilisation.

Options

  1. (A) Statement 1 is correct.
  2. (B) Statement 2 is correct
  3. (C) Both the statements are correct.
  4. (D) Both the statements are incorrect.

Answer

(B) Statement 2 is correct

#185 MCQ 1M

Question

The secretions of the ________ help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane.

Options

  1. (A) Nucleus
  2. (B) Acrosome
  3. (C) Neck
  4. (D) Middle piece

Answer

(B) Acrosome

#186 MCQ 1M

Question

During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that...

Options

  1. (A) Block the entry of additional sperms.
  2. (B) Allow the entry of additional sperms
  3. (C) Make the membrane permeable for the entry of additional sperms
  4. (D) Proliferate membrane for the entry of additional sperms.

Answer

(A) Block the entry of additional sperms.

#187 MCQ 1M

Question

Entry of sperm inside ovum induces the completion of the meiotic division of the...

Options

  1. (A) Secondary oocyte
  2. (B) Tertiary oocyte
  3. (C) Tertiary follicle
  4. (D) Graffian follicle

Answer

(A) Secondary oocyte

#188 MCQ 1M

Question

The second meiotic division is ________ and results in the formation of a second polar body and a haploid ovum (ootid).

Options

  1. (A) Equal
  2. (B) Unequal
  3. (C) Simultaneously with first meiotic division
  4. (D) Both (B) and (C)

Answer

(B) Unequal

#189 MCQ 1M

Question

Select the incorrect ploidy from the following.

Options

  1. (A) Secondary oocyte-n
  2. (B) Ootid-n
  3. (C) First Polar body-n
  4. (D) Second polar body-2n

Answer

(D) Second polar body-2n

#190 MCQ 1M

Question

Implantation is the process of_______.

Options

  1. (A) Attachment of blastocyst to the uterine wall
  2. (B) Egg movement
  3. (C) Degeneration of egg
  4. (D) Egg fertilization

Answer

(A) Attachment of blastocyst to the uterine wall

#191 MCQ 1M

Question

The daughter cells formed as a result of cleavage of a zygote are called.

Options

  1. (A) Blastocysts
  2. (B) Blastula
  3. (C) Blastomeres
  4. (D) Blastocoel

Answer

(C) Blastomeres

#192 MCQ 1M

Question

Meiosis-I division is a characteristic feature of

Options

  1. (A) Primary spermatocyte
  2. (B) Secondary oocyte
  3. (C) Primary oocyte
  4. (D) Both (B) and (C)

Answer

(D) Both (B) and (C)

#193 MCQ 1M

Question

The blastomeres in the blastocyst are arranged into an outer layer called __a__ and an inner group of cells called the __b__

Options

  1. (A) a. Trophoblast b. Inner cell mass
  2. (B) a. Inner cell mass b. Trophoblast
  3. (C) a. Theca externa b. Theca interna
  4. (D) a. Granulosa b. Cumulus oophorus

Answer

(A) a. Trophoblast b. Inner cell mass

#194 MCQ 1M

Question

Egg implantation is followed by______.

Options

  1. (A) Parturition
  2. (B) Copulation
  3. (C) Fertilisation
  4. (D) Gestation

Answer

(D) Gestation

#195 MCQ 1M

Question

The __a__ then gets attached to the endometrium and the __b__ gets differentiated as the embryo.

Options

  1. (A) a. Trophoblast b. Inner cell mass
  2. (B) a. Inner cell mass b. Trophoblast
  3. (C) a, b Trophoblast
  4. (D) a, b Inner cell mass

Answer

(A) a. Trophoblast b. Inner cell mass

#196 MCQ 1M

Question

Morula is a developmental stage:

Options

  1. (A) Between the zygote and blastocyst
  2. (B) Between the blastocyst and gastrula
  3. (C) After the implantation
  4. (D) Between implantation and parturition

Answer

(A) Between the zygote and blastocyst

#197 MCQ 1M

Question

Which layer of blastocyst gets attached to the endometrium during implantation?

Options

  1. (A) Trophoblast
  2. (B) Blastomere
  3. (C) Inner cell mass
  4. (D) Morula

Answer

(A) Trophoblast

#198 MCQ 1M

Question

The inner cell mass of blastocyst develops into

Options

  1. (A) Morula
  2. (B) Trophoblast
  3. (C) Embryo
  4. (D) Zygote

Answer

(C) Embryo

#199 MCQ 1M

Question

Ectoderm, endoderm and mesoderm are formed by ________ of the embryo of human.

Options

  1. (A) Placenta
  2. (B) Trophoblast
  3. (C) Inner cell mass
  4. (D) Both (B) and (C)

Answer

(C) Inner cell mass

#200 MCQ 1M ▦ 1

Question

Match the following columns and select the correct option.

Column I

Column II

a.

Placenta

i.

Androgens

b.

Zona

pellucida

ii.

Human chroinic Gonadotropin

c.

Bulbo-urethral

iii.

Layer of the ovum

d.

Leydig cells

iv.

Lubrication of the Penis

Options

  1. (A) a – i, b – iv, c – ii, d – iii
  2. (B) a – iii, b – ii, c – iv, d – i
  3. (C) a – ii, b – iii, c – iv, d – i
  4. (D) a – iv, b – iii, c – i, d – ii

Answer

(C) a – ii, b – iii, c – iv, d – i

#201 MCQ 1M

Question

The first movements of the foetus and appearance of hair on the head are usually observed during the:

Options

  1. (A) Third month
  2. (B) Fifth month
  3. (C) Sixth month
  4. (D) Seventh month

Answer

(B) Fifth month

#202 MCQ 1M

Question

During pregnancy the levels of other hormones like estrogens, progesterone, cortisol, prolactin, thyroxine, etc., are increased several folds in the maternal blood for which of these functions:
i. Foetal growth
ii. Metabolic changes in the mother
iii. Maintenance of pregnancy

Options

  1. (A) i and iii
  2. (B) ii and iii
  3. (C) only i
  4. (D) i, ii and iii

Answer

(D) i, ii and iii

#203 MCQ 1M

Question

Placenta is:

Options

  1. (A) A structural and functional unit between developing embryo (foetus) and maternal body.
  2. (B) Structure that is formed by the chorionic villi and uterine tissue when become interdigitated with each other.
  3. (C) Endocrine and produce hormones.
  4. (D) All of these

Answer

(D) All of these

#204 MCQ 1M

Question

After implantation, finger-like projections appear on the trophoblast called:

Options

  1. (A) Amnionic villi
  2. (B) Chorionic villi
  3. (C) Fimbrae
  4. (D) Clitoris

Answer

(B) Chorionic villi

#205 MCQ 1M

Question

Placenta secretes:

Options

  1. (A) hCG
  2. (B) hPL
  3. (C) Estrogen
  4. (D) All of these

Answer

(D) All of these

#206 MCQ 1M

Question

After implantation the finger-like projections on the trophoblast are surrounded by

Options

  1. (A) Uterine tissue
  2. (B) Maternal blood
  3. (C) Both (A) and (B)
  4. (D) Either (A) or (B)

Answer

(C) Both (A) and (B)

#207 MCQ 1M

Question

The structural and functional unit between the foetus and maternal blood is known as

Options

  1. (A) Inner cell
  2. (B) Placenta
  3. (C) Trophoblast
  4. (D) Chorionic villi

Answer

(B) Placenta

#208 MCQ 1M

Question

The placenta is connected to embryo through ____ cord.

Options

  1. (A) Chorionic
  2. (B) Umbilical
  3. (C) Amniocentic
  4. (D) Uterine

Answer

(B) Umbilical

#209 MCQ 1M

Question

Placenta also acts as a/an _____ tissue.

Options

  1. (A) Endocrine
  2. (B) Exocrine
  3. (C) Paracrine
  4. (D) Mepacrine

Answer

(A) Endocrine

#210 MCQ 1M

Question

In human embryonic development, which layer develops between the ectoderm and endoderm?

Options

  1. (A) Mesothelium
  2. (B) Mesoderm
  3. (C) Myoderm
  4. (D) Myometrium

Answer

(B) Mesoderm

#211 MCQ 1M

Question

After one month of pregnancy which vital organ is formed in the foetus?

Options

  1. (A) Brain
  2. (B) Heart
  3. (C) Lungs
  4. (D) Liver

Answer

(B) Heart

#212 MCQ 1M

Question

In a developing foetus, most of the major organ systems are developed by the end of ______ weeks.

Options

  1. (A) 14
  2. (B) 12
  3. (C) 10
  4. (D) 16

Answer

(B) 12

#213 MCQ 1M

Question

Foetal limbs and digits are formed in the _______ month of embryonic development.

Options

  1. (A) 4th
  2. (B) 2nd
  3. (C) 3rd
  4. (D) 7th

Answer

(B) 2nd

#214 MCQ 1M

Question

The second trimester of human pregnancy is characterized by

Options

  1. (A) Appearance of heart and aorta
  2. (B) Appearance of external genital organs
  3. (C) Appearance of fine hair, eye-lashes on the eyelids
  4. (D) Appearance of limbs and digits

Answer

(C) Appearance of fine hair, eye-lashes on the eyelids

#215 MCQ 1M

Question

Chorionic villi and uterine tissue fuse to form ________.

Options

  1. (A) Zygote
  2. (B) Blastula
  3. (C) Placenta
  4. (D) Endometrium

Answer

(C) Placenta

#216 MCQ 1M

Question

Hormones secreted by the placenta to maintain pregnancy are

Options

  1. (A) hCG, hPL, Progesterone, Prolactin
  2. (B) hCG, hPL, Estrogens, Relaxin, Oxytocin
  3. (C) hCG, hPL, Progesterone, Estrogens
  4. (D) hCG, Progesterone, Estrogens, Glucocorticoids

Answer

(C) hCG, hPL, Progesterone, Estrogens

#217 MCQ 1M

Question

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

Options

  1. (A) Fourth month
  2. (B) Fifth month
  3. (C) Sixth month
  4. (D) Third month

Answer

(B) Fifth month

#218 MCQ 1M

Question

The average time span of human gestation is

Options

  1. (A) 8 months
  2. (B) 9 months
  3. (C) 10 months
  4. (D) 1 year

Answer

(B) 9 months

#219 MCQ 1M

Question

The signals of fetal ejection reflex originate from:

Options

  1. (A) Maternal pituitary
  2. (B) Maternal hypothalamus
  3. (C) Fully developed foetus and placenta
  4. (D) Fetal pituitary

Answer

(C) Fully developed foetus and placenta

#220 MCQ 1M

Question

In human adult females oxytocin:

Options

  1. (A) Stimulates pituitary to secrete vasopressin
  2. (B) Causes strong uterine contractions during parturition
  3. (C) Is secreted by anterior pituitary
  4. (D) Stimulates growth of kidney

Answer

(C) Is secreted by anterior pituitary

#221 MCQ 1M

Question

The scientific name of childbirth is

Options

  1. (A) Gestation
  2. (B) Parturition
  3. (C) Implantation
  4. (D) Foetal development

Answer

(B) Parturition

#222 MCQ 1M

Question

During parturition, the mild uterine contractions which lead to expulsion of the foetus is knows as,

Options

  1. (A) Foetal ejection release
  2. (B) Foetal ejection reflex
  3. (C) Foetal uterine reflex
  4. (D) Foetal placental reflex

Answer

(B) Foetal ejection reflex

#223 MCQ 1M

Question

Which hormone is responsible for severe uterine contractions during parturition?

Options

  1. (A) Oestrogen
  2. (B) Oxytocin
  3. (C) Progesterone
  4. (D) Relaxin

Answer

(B) Oxytocin

#224 MCQ 1M

Question

Assertion : During embryonic stage testes descend down and at the time of birth, it comes into scrotum.
Reason : Spermatogenesis process requires less than body temperature.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#225 MCQ 1M

Question

Assertion : If woman becomes pregnant then at every 28 days endometrium will degenerate.
Reason : Myometrium is made up of smooth muscles.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(D) A is wrong, but R is correct

#226 MCQ 1M

Question

Assertion : Proliferative phase is also called secretory phase.
Reason : Estrogen is responsible for proliferative phase.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(C) A is correct, but R is wrong

#227 MCQ 1M

Question

Assertion : Endometrium is required for the implantation of blastocyst.
Reason : In the absence of fertilisation, the corpus luteum degenerates, this causes disintegration of the endometrium.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#228 MCQ 1M

Question

Assertion : Breast-feeding during the initial period of infant growth is recommended by doctor for a bringing up a healthy baby.
Reason : Colostrum which contains several antibodies that are absolutely essential to develop resistance for the new born babies.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#229 MCQ 1M

Question

Assertion : After third week, heart is formed in the embryo.
Reason : In the fourth week, heart sound of the embryo will be detected.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#230 MCQ 1M

Question

Assertion : Seminal fluids makes 80% of the semen.
Reason : Semen is a white and viscous substance.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(C) A is correct, but R is wrong

#231 MCQ 1M

Question

Assertion : Mature ovum is not fertilised in the later part of the oviduct.
Reason : Menstruation occurs due to degeneration of endometrium.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#232 MCQ 1M

Question

Assertion : Parturition is induced by increasing level of prostaglandins and oxytocin.
Reason : This hormones cause stronger uterine contractions which leads to expulsion of the baby out of the uterus through the birth-canal soon after the infant is delivered.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#233 MCQ 1M

Question

Assertion : Myometrium is a middle layer of uterus.
Reason : It is made up of striated muscle.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(C) A is correct, but R is wrong

#234 MCQ 1M

Question

Assertion : Somatic cells form all different organs in a body.
Reason : Gametes carry inheritance by process of reproduction.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#235 MCQ 1M

Question

Assertion : Testes descend in the scrotum before the birth.
Reason : Scrotum maintains lower temperature required for spermatogenesis.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#236 MCQ 1M

Question

Assertion : Oogenesis starts from the embryonic stage.
Reason : Spermatogenesis starts at the age of puberty.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#237 MCQ 1M

Question

Assertion : By cleavage of zygote, blastocyst is formed.
Reason : This change occurs within one week.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#238 MCQ 1M

Question

Assertion : The first menstruation begins at puberty and is called menarche.
Reason : The cessation of menstrual cycle is called menopause.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#239 MCQ 1M

Question

Assertion : After the entry of sperm into secondary oocyte, it is now called zygote.
Reason : After the entry of sperm, the nucleus in the head is called male pronucleus.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#240 MCQ 1M

Question

Assertion : Secondary spermatocyte forms spermatids by mitosis.
Reason : Spermatids undergo spermiogenesis to form sperms.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(D) A is wrong, but R is correct

#241 MCQ 1M

Question

Assertion : hCG, hPL and relaxin hormones are produced in women only during pregnancy.
Reason : Placenta acts as an endocrine gland which secretes many hormones.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#242 MCQ 1M

Question

Assertion : Four sperms are formed from one primary spermatocyte.
Reason : Primary spermatocyte undergoes meiosis to produce sperms.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#243 MCQ 1M

Question

Assertion : Mammary gland is accessory reproductive gland.
Reason : The milk secreted by mammary gland gives nourishment to new born baby.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(A) A and R both are correct, and R is correct explanation of A.

#244 MCQ 1M

Question

Assertion : Colostrum is rich in antibodies.
Reason : Colostrum gives immunity to infant.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#245 MCQ 1M

Question

Assertion : One primary spermatocyte produces four sperms.
Reason : One primary oocyte produces four ovum.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(C) A is correct, but R is wrong

#246 MCQ 1M

Question

Assertion : Parturition is a complex neuroendocrine mechanism.
Reason : Oxytocin plays significant role during parturition.

Options

  1. (A) A and R both are correct, and R is correct explanation of A.
  2. (B) A and R both are correct, but R is not correct explanation of A.
  3. (C) A is correct, but R is wrong
  4. (D) A is wrong, but R is correct

Answer

(B) A and R both are correct, but R is not correct explanation of A.

#247 MCQ 1M 🖼 1

Question

Identify a,b,c,d in a given diagram:

Options

  1. (A) a – Ribs, b – Mammary duct,
  2. (B) a – Intercoastal Muscle, b – Mammary lobe
  3. (C) a– Pectoralis major muscle, B – Ampulla,
    c – Mammary lobe, d – Lactiferous duct
  4. (D) a – Ribs, b – Ampulla,

Answer

(C) a– Pectoralis major muscle, B – Ampulla,
c – Mammary lobe, d – Lactiferous duct

#248 MCQ 1M

Question

Identify the following diagram:

Options

  1. (A) Morula
  2. (B) Blastocyst
  3. (C) Trophololast
  4. (D) Blastocoel

Answer

(B) Blastocyst

#249 MCQ 1M 🖼 1

Question

Identify the follicle containing antrum in a given diagram.
P

Options

  1. (A)
    P
  2. (B)
    Q
  3. (C)
    R
  4. (D)
    S

Answer

(B)

Q

#250 MCQ 1M 🖼 1

Question

Identify 'e' in a given Diagram:
figure failed to load: NNSUpSkpLLJOVWpCQlKXlDSYFDSlKSkjcQ4P8HgQoseJVko+wAAAAASUVORK5CYII=

Options

  1. (A) Morulla
  2. (B) Zygote
  3. (C) Blstocyst
  4. (D) Egg

Answer

(A) Morulla

#251 MCQ 1M 🖼 1

Question

Choose the correct option for 'X' in given diagram.

Options

  1. (A) Blastomere cells in the Morula stage.
  2. (B) Trophoblast seen in the blastocyst which gives nourishment.
  3. (C) Inner cell mass which can differntiate in embryo.
  4. (D) Ovarian follicle with secondary oocyte in Oogenesis.

Answer

(C) Inner cell mass which can differntiate in embryo.

#252 MCQ 1M 🖼 1 ▦ 1

Question

Identify x, y, z in a given diagram.
figure failed to load: wHmT50xHuPV0QAAAABJRU5ErkJggg==

x

y

z

(A)

Middle part

Tail

Head

(B)

Acrosome

Neck

Head

(C)

Neck

Tail

Middle part

(D)

Acrosome

Head

Neck

Options

  1. (A) z
  2. (B) x
  3. (C) y

Answer

(D)

#253 MCQ 1M 🖼 1

Question

Identify P, Q, R in a given diagram.

Options

  1. (A) P – Primary Spermatocytes,
  2. (B) P – Spermatogonia, Q – Primary Spermatocytes,
    R – Sertoli cells
  3. (C) P – Leydig cells, Q – Sertoli cells, R – Sperm
  4. (D) P – Testicles, Q – Sperm, R – Sertoli cells

Answer

(B) P – Spermatogonia, Q – Primary Spermatocytes,
R – Sertoli cells

#254 MCQ 1M 🖼 1

Question

Identify 'A' in a given
diagram.
figure failed to load: uriKuivxl9ZwP8Pyt9LdNRyJfAAAAAASUVORK5CYII=

Options

  1. (A) Spermatogonium
  2. (B) Sperms
  3. (C) Sertoli cells
  4. (D) Interstitial cells

Answer

(D) Interstitial cells

#255 MCQ 1M

Question

Identify x and y in the diagram.

Options

  1. (A) x – Mitosis, y – Mitosis
  2. (B) x – Meiosis, y – Mitosis
  3. (C) x – Meiosis I, y – Meiosis II
  4. (D) x – Mitosis I, y – Mitosis I

Answer

(C) x – Meiosis I, y – Meiosis II

#256 MCQ 1M 🖼 1

Question

Identify A, B, C, D, E in a given diagram.
figure failed to load: jAZgQJP6rwzP8wVX8U7hKotcD+P8YZW4jJJQMeQAAAABJRU5ErkJggg==

Options

  1. (A) D – Middle part, E – Neck
  2. (B) A – Acrosome, B – Head,
  3. (C) A – Head, B – Acrosome,
  4. (D) A – Cell membrane, B – Acrosome,

Answer

(B) A – Acrosome, B – Head,

#257 MCQ 1M 🖼 1

Question

It is a diagrammatic sectional view of male reproductive system, in which identify the common duct that is formed by the fusion of duct of seminal vesicle and vas deferens:
figure failed to load: w8S6DtyOpW4+QAAAABJRU5ErkJggg==

Options

  1. (A) A
  2. (B) B
  3. (C) C
  4. (D) D

Answer

(A) A

#258 MCQ 1M 🖼 1

Question

Identify the parts of the female reproductive system and select the correct labelling.

Options

  1. (A) C-Uterus, B-Vagina, F-Labia majora
  2. (B) D- Uterus, B-Vagina, F-Labia minora
  3. (C) E-Clitoris, D-Uterus, A-Cervix
  4. (D) A-Cervix, D-Urinary bladder, F-Vaginal orifice

Answer

(D) A-Cervix, D-Urinary bladder, F-Vaginal orifice

#259 MCQ 1M 🖼 1

Question

Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D

Options

  1. (A) A-Vas deferens, B-Seminal vesicle, C-Prostate, D-Bulbourethral gland
  2. (B) A-Vas deferens, B-Seminal vesicle, C-Bulbourethral gland, D-Prostate
  3. (C) A-Ureter, B-Seminal vesicle, C-Prostate, D-Bulbourethral gland
  4. (D) A-Ureter, B-Prostate, C-Seminal vesicle, D-Bulbourethral gland

Answer

(A) A-Vas deferens, B-Seminal vesicle, C-Prostate, D-Bulbourethral gland

#260 MCQ 1M 🖼 1

Question

Identify 'C' in a given diagram.

Options

  1. (A) Female Gamete
  2. (B) First Polar body
  3. (C) Primary Oocyte
  4. (D) Secondary Oocyte

Answer

(D) Secondary Oocyte

#261 MCQ 1M 🖼 1

Question

Read the following statements about the given diagram carefully and state which of them are correct?
figure failed to load: zz+ivICr333GIKubnjZKdt7D0MRNWfGJVLywvDzriLydzF9fdhpXEVlg8rKbBCouHlcRWWDysJLbC4mElsRUWDyuJrbB4WElshYUD+Cf6w6NNhHsdhAAAAABJRU5ErkJggg==
(i) A-carries urine and sperms.
(ii) B-secretes a fluid that helps in the lubrication of penis.
(iii) D-produces testosterone but not sperms.
(iv) C-stores sperms.

Options

  1. (A) (i) and (ii)
  2. (B) (ii) and (iii)
  3. (C) (ii) and (iv)
  4. (D) (i) and (iv)

Answer

(C) (ii) and (iv)

#262 MCQ 1M 🖼 1

Question

Select the correct option for the following gonadotrophin hormone released during the menstrual cycle.

Options

  1. (A) A-FSH and B- LH
  2. (B) A-LH and B-FSH
  3. (C) A and B FSH
  4. (D) A and B LH

Answer

(A) A-FSH and B- LH

#263 MCQ 1M 🖼 1

Question

Select the correct labelling for the following:

Options

  1. (A) a.Endometrium, b.Myometrium, c.Perimetrium
  2. (B) a.Myometrium, b.Endometrium, c.Perimetrium
  3. (C) a.Perimetrium, b.Myometrium, c.Endometrium
  4. (D) a.Endometrium, b.Perimetrium, c.Myometrium

Answer

(A) a.Endometrium, b.Myometrium, c.Perimetrium

#264 MCQ 1M 🖼 1

Question

Select the correct labelling for the following diagram:

Options

  1. (A) A. Spermatid and B. Primary Spermatocyte
  2. (B) C. Secondary spermatocyte and D. Primary Spermatocyte
  3. (C) D. Spermatogonium and E. Sertoli cells
  4. (D) B. Spermatozoa and C. Primary Spermatocyte

Answer

(B) C. Secondary spermatocyte and D. Primary Spermatocyte

#265 MCQ 1M 🖼 1

Question

Refer to the given figure and choose the correct option regarding its parts labelled as A-F.

Options

  1. (A) E-secondary oocyte, F-Tertiary follicle showing antrum
  2. (B) C-Graafian follicle, A-Ovum
  3. (C) B-Primary follicle, C-Tertiary follicle showing antrum
  4. (D) E-Corpus callosum, D-Antrum cavity

Answer

(A) E-secondary oocyte, F-Tertiary follicle showing antrum

#266 MCQ 1M 🖼 1

Question

What is represented by 'X' in a given diagram?

Options

  1. (A) Zona Pellucida
  2. (B) Cells of the
  3. (C) Egg
  4. (D) Perivitelline space

Answer

(A) Zona Pellucida

S type: 1 Q ⤓ Export ZIP
#267 CS 🖼 1

Question

The male reproductive system is located in the pelvic region. It includes a pair of testes along with accessory ducts, glands and the external genitalia. The testes is a main reproductive organ which performs spermatogenesis and secretes male sex hormone testosterone.
Accessory ducts facilitate maturity and transport the sperms. It includes rete testis, vasa efferentia, epididymis and vas deferens.
The male accessory glands include paired seminal vesicles, a prostate and paired bulbourethral glands.
Secretions of these glands constitute the seminal plasma which is rich in fructose, calcium and certain enzymes. The secretions of bulbourethral glands, also helps in the lubrication of the penis.
The penis is the male external genitalia. It is made up of special tissue that helps in erection of the penis to facilitate insemination. The enlarged end of penis called the glans penis is covered by a loose fold of skin called foreskin.
(i) Describe the pathway for the transport of sperms in male.
(ii) What is x, y and z in a given diagram?
(iii) What is the function of testes?
(iv) Name the male accessory reproductive glands.

Answer

(i) Seminiferous tubules → rete testis → vasa efferentia → epididymis → vas deferens → urinogenital tract (ii) x Epididymis y Vas deferens - z - Bulbourethral gland
iii) Testes are main reproductive organ in male and has two functions : (i) formation of sperm (spermatogenesis) (ii) production of testosterone. (iv) (a) Seminal vesicle (one pair) (b) Prostate gland (one) (c) Bulbourethral gland (one pair)
S type: 1 Q ⤓ Export ZIP
#268 CS 🖼 2

Question

Diagram-A
Diagram-B
(i) What is the increased level of LH on 14th day known as in diagram-A?
(ii) As shown in diagram-B, why is the increased level of progesterone is necessary after 14th day?
(iii) What is the duration for menstruation, the proliferative phase, luteal phase?
(iv) As shown in diagram-A, what changes take place during day 6 to 13 due to increased level of estrogen?

Answer

(i) LH surge at the 14th day represents Ovulation. (ii) The Increased level of Progesterone after 14th day maintains the endometrium.
(iii) Menstruation – Day 3 to 5 Follicular phase – Day 6 to 13 Luteal phase – Day 15 to 28 (iv) The increased level of estogen
S type: 1 Q ⤓ Export ZIP
#269 CS

Question

In testis, the immature male germ cells (spermatogonia) produce sperm by spermatogenesis which begins at puberty. The spermatogonia (sing. spermatogonium) are present on the inner wall of seminiferous tubules. Study the chart of spermatogenesis below and answer the questions.
figure failed to load: g9B3y+i2JU30gAAAABJRU5ErkJggg==
(i) What do x and y stands for given diagram?
(ii) What is the process of sperm synthesis from spermatids known as?
(iii) What is the ploidy of primary spermatocytes, secondary spermatocytes, spermatids and sperms?
(iv) How many sperms will be produced from 100 primary spermatocytes?

Answer

(i) Meiosis I and Meiosis II (ii) The formation of sperms from the spermatids is called spermiogenesis. (iii) Primary Spermatocyte - 2n Secondary Spermatocyte - n Spermatid - n Sperm – n (iv) 1 Primary Spermatocytes give rise to 4 sperms. Thus, 400 sperms will be produced from 100 primary Spermatocytes.
S type: 1 Q ⤓ Export ZIP
#270 CS 🖼 1

Question

A functional mammary gland is characteristic of all female mammals. The mammary glands are paired structures (breasts) that contain glandular tissue and variable amount of fat. Study the following diagram and answer the following questions.
(i) Study the following statements regarding structure of mammary gland.
(i) contains variable amount of fat.
(ii) It is modified sweat glands.
(iii) Made up of glandular tissue.
Choose correct option regarding correct statements given above.
(a) i and ii (b) i, ii and iii
(b) ii and iii (d) only iii
(ii) Mammary gland is divided into_______ mammary lobes.
(a) 20-22 (b) 15-20
(c) 22-25 (d) 130
(iii) Choose the correct option regarding path of duct in the mammary gland.
(a) mammary lobes → lactiferous duct → mammary tubules → Mammary duct → Mammary ampulla → Alveoli
(b) lactiferous duct → mammary lobes → mammary tubules → Mammary duct → Mammary ampulla → Alveoli
(c) Alveoli → mammary ampulla → mammary duct → Mammary tabule → lactiferous duct → mammary lobes
(d) Mammary lobes → mammary tabules → lactiferous duct → Mammary ampulla → mammary duct
(iv) Mammary glands are present above the _______ muscles.
(a) Pectoralis minor muscle
(b) Pectoralis major muscle
(c) Intra - Inter-intercostal muscles.
(d) Extra - Intor-intercostal muscles

Answer

(i) (b) i, ii and iii (ii) (b) 15-20 (iii) (d) Mammary lobes → Alveoli → Mammary tubues → Lactiferous duct → Mammary ampulla → Mammary duct. (iv) (d) Pectoralis major muscle.
S type: 1 Q ⤓ Export ZIP
#271 CS 🖼 1

Question

The reproductive cycle in the female primates (e.g. monkeys, apes and human beings is called menstrual cycle. The first menstruation begins at puberty and is called menarche. In human females, menstruation is repeated at an average interval of about 28/29 days, and the cycle of events starting from one menstruaction till the next one is called the menstrual cycle. One ovum is released (ovulation) during the middle of each menstrual cycle.
(i) The ovulation occurs on _______ day and _________ surge is seen on that duration.
(a) 6, LH (b) 12, LH
(c) 14, LH (d) 21, LH
(ii) On which day is the thickness of the Endometrium at its maximum?
(a) 13th day (b) 14th day (c) 17th day (d) 23rd day
(iii) Which hormone is necessary for the main-tenance of the endometrium ?
(a) Prolactin (b) LH
(c) Progesterone (d) Oxytocin
(iv) Which of the following events indicates the beginning of the menstruation ?
(a) LH Surge
(b) Increase in estrogen levels
(c) Decrease in the progesterone levels
(d) Commencement of menstruation

Answer

(i) (c) 14, LH (ii) (d) 23rd day (iii) (c) Progesterone (iv) (d) Commencement of menstruation
S type: 1 Q ⤓ Export ZIP
#272 CS 🖼 1

Question

The mature female gamete / ovum is spherical in shape. the human ovum is almost free from yolk an is called alecithal. The human ovum loses its ability to fertilize approximately 24 hours after ovulation. Study the following diagram and answer the following.
(i) The acellular structure surrounding the ovum is called ___________ .
(a) Perivitelline space (b) Zona pellucida
(c) Zona reticulosa (d) corona radiata
(ii) Identify 'X' in igven figure.
(a) Perivitelline space (b) Zona pellucida
(c) Zona reticulosa (d) corona radiata
(iii) Choose correct option.

X

Y

Z

(a)

Zona pellucida

Perivitelline space

Corona radiata

(b)

Corona radiata

Zona pellucida

Perivitelline space

(c)

Zona pellucida

Corona radiata

Perivitelline space

(d)

Perivitelline space

Corona radiata

Zona pellucida
(iv) The glandular layer surrounding ovum is called __________.
(a) Zona pellucida (b) Corona radiata
(c) Zona glomerulosa (d) Perivitelline space

Answer

(i) (b) Zona pellucida (ii) (c) Zona pellucida (iii) (a) Zona Pellucida, corona radiata, Perivitelline space. (iv) (b) Corona radiata

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