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NEET • BIOLOGY • HUMAN REPRODUCTION

Human reproduction practice · Hard

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Showing 31-56 of 56 questions
31 Hard
31 of 56
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Bartholin's glands of female correspond to which glands in male?
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Correct option: A
Cowper's glands
Option A (Cowper's glands) is correct because Bartholin's glands in females are homologous to Cowper's glands (bulbourethral glands) in males, both secreting lubricating fluids.
32 Hard
32 of 56
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The primary egg membrane of mammalians egg is termed:
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Correct option: A
Zona pallucida
Option A (Zona pallucida) is correct because the zona pellucida is the primary glycoprotein layer surrounding the mammalian oocyte.
33 Hard
33 of 56
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The activation of sperms which takes place in the female genital tract is called
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Correct option: D
Capacitation
Option D (Capacitation) is correct because capacitation refers to the physiological changes that sperm undergo in the female reproductive tract, enabling them to fertilize an egg.
34 Hard
34 of 56
Application +4 | -1
If a women started menstruating at the age of 15 and attained menopause at around the age of 45. She has 3
children's and got 2 still births. Number of second polar body and ootid formed in her lifetime would be:
View answer and explanation
Correct option: D
5 & 5 respectively
Option D (5 & 5 respectively) is correct because each oocyte that completes meiosis produces one ootid and one second polar body. The woman had 3 live births and 2 still births, so 5 oocytes completed meiosis.
35 Hard
35 of 56
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The portion of the endometrium that covers the embryo and is located between the embryo and uterine cavity is the
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Correct option: C
desidua capsularis
Option C (desidua capsularis) is correct because the decidua capsularis is the portion of the endometrium that encapsulates the embryo and is located between the embryo and the uterine cavity.
36 Hard
36 of 56
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Cells of Leydig are found in:
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Correct option: B
Testes of rabbit
Option B (Testes of rabbit) is correct because Leydig cells, which produce testosterone, are found in the interstitial spaces of the testes in mammals, including rabbits.
37 Hard
37 of 56
Understanding +4 | -1
Termination of gastrulation is indicated by
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Correct option: B
Obliteration of blastocoel
Option B (Obliteration of blastocoel) is correct because the blastocoel, the fluid-filled cavity within the blastula, is obliterated during gastrulation as the archenteron forms.
38 Hard
38 of 56
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hCG is produced by
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Correct option: D
Syncytiotrophoblastic cells of the placenta
Option D (Syncytiotrophoblastic cells of the placenta) is correct because hCG is produced by the syncytiotrophoblast cells of the placenta shortly after implantation.
39 Hard
39 of 56
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The placenta is formed from the ______of the embryo and the ________of the mother.
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Correct option: B
chorion, endometrium
Option B (chorion, endometrium) is correct because the placenta is formed from the chorion of the embryo and the endometrium of the mother.
40 Hard
40 of 56
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Increase in concentration of which hormone determines the time of child birth?
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Correct option: A
CRH
Option A (CRH) is correct because an increase in corticotropin-releasing hormone (CRH) concentration towards the end of pregnancy is thought to play a role in determining the timing of childbirth.
41 Hard
41 of 56
Remembering +4 | -1
Correctly matched pairs are:

1. Clitoris: Erectile body in female homologous to glans penis of male

2. Coitus: Sexual intercourse

3. Colostrum: Secretion found in seminal fluid

4. Areola: Pigmented circular area around the nipple
View answer and explanation
Correct option: B
1 and 2 are correct
Option B (1 and 2 are correct) is correct because the clitoris is indeed homologous to the glans penis, and coitus refers to sexual intercourse.
42 Hard
42 of 56
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Formation of corpus luteum in induced by
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Correct option: A
LH
Option A (LH) is correct because luteinizing hormone (LH) is responsible for inducing the formation of the corpus luteum from the remnants of the ovarian follicle after ovulation.
43 Hard
43 of 56
Remembering +4 | -1
Menstrual cycle occurs due to lack of:
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Correct option: D
Progesterone
Option D (Progesterone) is correct because the decline in progesterone levels leads to the shedding of the uterine lining, resulting in menstruation.
44 Hard
44 of 56
Understanding +4 | -1
Given below are two statements:
Statement I: The release of sperms into the seminiferous tubules is called spermiation.
Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia.
Choose the most appropriate answer from the options given below:
View answer and explanation
Correct option: C
Both Statement I and Statement II are incorrect
Option C (Both Statement I and Statement II are incorrect) is correct because spermiation is the release of sperm from Sertoli cells, and spermiogenesis is the transformation of spermatids into spermatozoa.
45 Hard
45 of 56
Understanding +4 | -1
If both ovaries are removed from the rat, the concentration of which hormone is decreased in blood?
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Correct option: C
Estrogen
Option C (Estrogen) is correct because the ovaries are the primary source of estrogen production in females.
46 Hard
46 of 56
Understanding +4 | -1
How many of the following are correct.

p) The secretions of bulbourethral glands helps in the lubrication of the penis.

q) Cervix along with vagina forms the birth canal.

r) The secondary follicle soon transforms into a tertiary follicle which is characterised by a fluid filled cavity called antrum.

s) LH surge induces rupture of Graafian follicle and thereby the release of ovum
View answer and explanation
Correct option: D
Four
Option D (Four) is correct because all four statements are correct regarding the male and female reproductive systems.
47 Hard
47 of 56
Remembering +4 | -1
Two hormones that regulate the menstrual cycle are:
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Correct option: C
Estrogens and progesterone
Option C (Estrogens and progesterone) is correct because these two hormones primarily regulate the menstrual cycle, controlling the growth and shedding of the uterine lining.
48 Hard
48 of 56
Understanding +4 | -1
Choose the incorrect statement from the following?
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Correct option: C
Poly spermy in mammals is prevented by the chemical changes in the egg surface
Option D (In the human female implantation occurs almost seven days after fertilisation) is the correct answer because polyspermy is prevented by electrical and chemical changes in the egg surface, and implantation occurs about 7 days after fertilization.
49 Hard
49 of 56
Remembering +4 | -1
Cumulus covers:
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Correct option: B
Ovum
Option B (Ovum) is correct because the cumulus oophorus is a layer of cells surrounding the ovum.
50 Hard
50 of 56
Understanding +4 | -1
Spermatogenesis differs from oogenesis in all of the following except.
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Correct option: B
All spermatogonia develop into primary spermatocytes which undergoes meiosis at puberty.
Option B (All spermatogonia develop into primary spermatocytes which undergoes meiosis at puberty) is correct because not all oogonia develop into primary oocytes at puberty; many degenerate before.
51 Hard
51 of 56
Understanding +4 | -1
Statement-A : Not all copulations lead to fertilisation and pregnancy.

Statement-B : Fertilisation can occur if the ovum and the sperms are simultaneously transported to the fallopian tubes.
View answer and explanation
Correct option: C
Both A and B statements are correct
Option C (Both A and B statements are correct) is correct because not all copulations lead to fertilization and pregnancy, and fertilization requires the simultaneous transport of ovum and sperm to the fallopian tubes.
52 Hard
52 of 56
Understanding +4 | -1
A women has suffered from miscarriage (abortion) in the last days of first month of pregnancy, the possible reason can be
View answer and explanation
Correct option: C
Decreased secretion of hCG
Option C (Decreased secretion of hCG) is correct because hCG is essential for maintaining the corpus luteum and progesterone secretion during early pregnancy, and a decrease can lead to miscarriage.
53 Hard
53 of 56
Understanding +4 | -1
When the sperm reaches the ovum, it must first gain entry into the ovum by crossing its protective covering. Which hormone helps in degenerating the outer covering?
View answer and explanation
Correct option: D
Hyaluronidase
Option D (Hyaluronidase) is correct because hyaluronidase, an enzyme present in the acrosome of the sperm, helps to break down the hyaluronic acid that holds the cells of the corona radiata together, allowing the sperm to penetrate the ovum.
54 Hard
54 of 56
Remembering +4 | -1
In females, certain developmental changes occur during pregnancy due to the release of hormones. Which hormone is responsible for the enlargement of breasts during pregnancy?
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Correct option: B
Progesterone
Option B (Progesterone) is correct because progesterone, along with estrogen, is responsible for the enlargement of breasts during pregnancy.
55 Hard
55 of 56
Understanding +4 | -1
During fertilization, a sperm comes in contact with the XX layer of the ovum and induces changes in the membrane that YY the entry of additional sperms.

Select the correct option for XX and YY respectively.
View answer and explanation
Correct option: A
Zona pellucida and block
Option A (Zona pellucida and block) is correct because the sperm first contacts the zona pellucida, and the cortical reaction blocks polyspermy.
56 Hard
56 of 56
Remembering +4 | -1
Which of the following statements are correct
with respect to hormones secreted by
placenta?

(i) Placenta secretes relaxin during later stage of
pregnancy.

(ii) Placenta secretes high amount of FSH during
pregnancy.

(iii) Placenta secretes relaxin during initial stage
of pregnancy.

(iv) Placenta secretes hCG and hPL during
pregnancy.
View answer and explanation
Correct option: A
(i) and (iv)
Option A ((i) and (iv)) is correct because the placenta secretes relaxin during the later stages of pregnancy, and hCG and hPL throughout pregnancy.
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