Human Reproduction — DPP 3

20 NEET questions from Human Reproduction, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
In human beings, pregnancy lasts for 9 months. The gestation period of dog, elephant, cat and cow is given below. Which of the following is wrong match?
  1. A
  2. B
  3. C
  4. D
Show answer & explanation

Correct answer: D

Cow's gestation period = 279 to 292 days.
2
Match the items given in Column-I with those in Column-II and choose the correct option.
Human Reproduction – NEET-9454
  1. A a(iii), b(i), c(ii)
  2. B a(i), b(ii), c(iii)
  3. C a(ii), b(i), c(iii)
  4. D a(i), b(iii), c(ii)
Show answer & explanation

Correct answer: A

Amenorrhea is absence of menstrual cycle whose common reason can be fertilisation of ova. At menopause, gonadotropins increase due to absence of negative feedback.
3
The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _______.
  1. A By the end of the second month of pregnancy
  2. B By the end of first trimester
  3. C After one month of pregnancy
  4. D During fifth month
Show answer & explanation

Correct answer: C

The first heart sounds can be heard after four weeks of embryonic development.
4
Sometimes the labor pains are less and uterine contractions have to be induced. What do you think the doctors inject to facilitate delivery?
  1. A Progesterone and estrogen hormones
  2. B Oxytocin/Pitocin
  3. C FSH and LH
  4. D Relaxin
Show answer & explanation

Correct answer: B

Oxytocin is also called birth hormone and milk ejecting hormone
5
Which of the following is the correct match about the female external genitalia and their functions?
  1. A Mons pubis : Cushion of fatty tissue covered by skin and pubic hair and surrounds the vaginal orifice
  2. B Labia majora : Fleshy folds of tissue which extend down from the mons pubis and surround the vaginal opening
  3. C Labia minora : Paired folds of tissue under the labia majora homologous to scrotum in males
  4. D Clitoris : A tiny finger like structure which lies at the upper junction of the two labia minora above the urethral opening. It is analogous to penis in males
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Correct answer: B

Labia majora surround the vaginal opening and are homologous to scrotum.

Clitoris is homologous to penis.
6
Why do all copulations not lead to fertilisation and pregnancy? The root cause is _______.
  1. A Due to numerous sperms and one ovum
  2. B Due to less progesterone
  3. C Ovum and sperms are not transported simultaneously to the ampulla
  4. D Due to non-formation of corpus luteum
Show answer & explanation

Correct answer: C

Life span of sperm in male reproductive tract → few weeks

Life span of sperm in female reproductive tract → 48 to 72 hours.

Viability of secondary oocyte after its release is for 24 hours.

So, both must be viable for fertilization to occur.
7
Hormone secreted only during pregnancy is
  1. A Cortisol
  2. B Progesterone
  3. C hPL
  4. D Estrogen
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Correct answer: C

Human placental lactogen i.e. hPL acts on mammary glands to facilitate the process of lactation. Cortisol, progesterone and estrogen are secreted in non-pregnant females also.
8
Which of the following is a set of male accessory ducts?
  1. A Rete testis, vasa efferentia, tubuli recti, oviduct
  2. B Rete testis, vasa efferentia, epididymis and vas deferens
  3. C Epididymis, ejaculatory duct, urethra
  4. D Seminiferous tubules, vasa efferentia, epididymis and vas deferens
Show answer & explanation

Correct answer: B

The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens. Oviduct is accessory duct in females.
9
Foetal ejection reflex in human female is induced by
  1. A Differentiation of mammary gland
  2. B Pressure exerted by amniotic fluid
  3. C Fully developed foetus and placenta
  4. D Release of oxytocin from pituitary
Show answer & explanation

Correct answer: C

The signals for parturition originate from fully developed foetus and the placenta which induce mild uterine contractions called foetal ejection reflex. This triggers release of oxytocin from the maternal pituitary.
10
Given below is a diagrammatic sketch of a portion of human male reproductive system. Which of the following part contributes to the maximum portion of semen?
Human Reproduction – NEET-9562
  1. A D
  2. B C
  3. C B
  4. D A
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Correct answer: C

Seminal vesicles contribute the major part of the ejaculate ($\sim 70 \%$) C is prostate gland and D is bulbourethral gland.
11
Identify the stages A and B and select the correct labelling of C and D?
Human Reproduction – NEET-9623 Choose the correct option.

  1. A
  2. B
  3. C
  4. D
Show answer & explanation

Correct answer: C

Blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called the inner cell mass.
12
Which of the following depicts the site of implantation of blastocyst under normal condition?
Human Reproduction – NEET-9564
  1. A II
  2. B V
  3. C I
  4. D VI
Show answer & explanation

Correct answer: C

I → Endometrium
II → Myometrium
III → Infundibulum
IV → Fimbriae
V → Cervical canal
VI → Vagina
13
Read the following statements and choose correct option.
Statement-1 : During pregnancy the levels of hormones like estrogens, progestogens, cortisol, prolactin, thyroxine etc, are increased several folds in the maternal blood.
Statement-2: Increased production of these hormones is essential for supporting the fetal growth, metabolic changes in the mother and maintenance of pregnancy.
  1. A Both statements are correct and statement-2 is the correct explanation of statement-1
  2. B Both statements are correct but statement-2 is not the correct explanation of statement-1
  3. C Statement-1 is correct and statement-2 is incorrect
  4. D Both statements are incorrect
Show answer & explanation

Correct answer: A

Placenta is an organ which connects the foetus with uterine wall. The hCG stimulates corpus luteum of pregnancy to continue to secrete progesterone for a long time after its normal lifetime.
14
Which of the following is not a hormone secreted by corpus luteum?
  1. A Relaxin
  2. B Luteinising hormone
  3. C Progesterone
  4. D Estrogen
Show answer & explanation

Correct answer: B

LH maintains corpus luteum. Relaxin is released from corpus luteum in pregnant females while estrogen and progesterone are secreted from corpus luteum in both pregnant and non-pregnant females.
15
Identify the hormones that are secreted in large amount prior to ovulation
A. LH
B. FSH
C. Estrogen
D. Progesterone
  1. A A only
  2. B A & B only
  3. C A, B & C
  4. D A, B, C & D
Show answer & explanation

Correct answer: C

Human Reproduction – NEET-9582
16
Which of the following is not a correct statement about umbilical cord?
  1. A It connects the placenta to the embryo
  2. B It helps in the transport of substances to and from the embryo
  3. C It produces several hormones like hPL, estrogen and progesterone
  4. D It has 100% foetal blood
Show answer & explanation

Correct answer: C

Umbilical cord is not an endocrine structure but placenta functions as temprary endocrine gland.
17
What induces the completion of the meiotic division of the secondary oocyte?

  1. A Contact of the sperm with the zona pellucida layer of the ovum
  2. B The entry of the sperm into the cytoplasm of the ovum through the zona pellucida and the plasma membrane
  3. C Entry of the sperm in the ampullary-isthmic junction
  4. D Copulation
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Correct answer: B

The secretions of the acrosome help the sperm enter into cytoplasm of the ovum through the zona pellucida and the plasma membrane. This induces the completion of the meiotic division of the secondary oocyte.
18
Inhibition of uterine contraction ceases and the bleeding and cramps of menstruation begin due to
  1. A Increase in level of progesterone
  2. B Decrease in level of progesterone
  3. C Increase in level of LH
  4. D Decrease in level of FSH
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Correct answer: B

Low level of progesterone cause menstruation because progesterone is responsible for maintaining stability of endometrium of uterus.
19
Which of the following labelled parts produces energy for the movement of the tail that facilitates sperm motility essential for fertilisation?
Human Reproduction – NEET-9575
  1. A A
  2. B B
  3. C C
  4. D D
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Correct answer: C

A - Acrosome (has enzymes that help in fertilization)
B - Nucleus (chromosomal material)
C - Middle piece (having mitochondria that serve as energy source for swimming)
D - Tail (for motility)
20
Which centriole of spermatozoa is required for first cleavage?
  1. A Proximal centriole
  2. B Distal centriole
  3. C Ring centriole
  4. D Posterior centriole
Show answer & explanation

Correct answer: A

Proximal centriole and nucleus of sperm enter the secondary oocyte during fertilization.

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