Human Reproduction — DPP 2

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 female, menstruation can be delayed by the administration of
  1. A Progesterone
  2. B FSH
  3. C Oxytocin
  4. D LH
Show answer & explanation

Correct answer: A

Progesterone is essential for maintenance of the endometrium.
2
Read the given statements.
A. Leydig cells are located in interstitial spaces in testes.
B. Sertoli cells of seminiferous tubules provide nourishment to developing sperms.
Select the correct option.
  1. A Only statement A is correct
  2. B Only statement B is correct
  3. C Both statements A and B are correct
  4. D Both statements A and B are incorrect
Show answer & explanation

Correct answer: C

ICSH from anterior pituitary targets Leydig cells. Sertoli cells are called sustentacular cells as they provide nourishment for developing sperms.
3
Fertilisation in human beings occurs at
  1. A Isthmus
  2. B Ampulla
  3. C Uterus
  4. D Infundibulum
Show answer & explanation

Correct answer: B

Sperms and ova must reach ampulla simultaneously.
4
The chromosome number in meiocytes of human beings is A while genetic constitution of their male gametes may be represented by B
Choose the option that fills the blanks correctly.
  1. A
  2. B
  3. C
  4. D
Show answer & explanation

Correct answer: B

Genetic constitution of sperm forming cells is (44 + XY), sperms formed can have either (22 + X) or (22 + Y) as chromosome number. Meiocytes are diploid in nature while gametes are haploid.
5
A temporary endocrine gland formed after ovulation in human female is
  1. A Thymus gland
  2. B Corpus albicans
  3. C Corpus luteum
  4. D Corpus callosum
Show answer & explanation

Correct answer: C

The ovulatory phase is followed by luteal phase. In luteal phase, the levels of estrogen and progesterone will rise, while FSH and LH levels drop. Corpus luteum is formed after ovulation.
6
Shedding of endometrium is triggered by decline in
  1. A Estrogen
  2. B FSH
  3. C Progesterone
  4. D hCG
Show answer & explanation

Correct answer: C

Progesterone is responsible for maintaining stability of endometrium. Decline in LH is responsible for regression of corpus luteum.
7
In human beings, menstrual cycles cease around 50 years of age, this is termed as
  1. A Implantation
  2. B Ovulation
  3. C Menarche
  4. D Menopause
Show answer & explanation

Correct answer: D

Cessation of menstrual cycle around 50 years is called menopause in primates. Cyclic menstruation is an indicator of normal reproductive phase.
8
Funnel shaped part of the oviduct closer to the ovary is
  1. A Isthmus
  2. B Cervical canal
  3. C Infundibulum
  4. D Fimbriae
Show answer & explanation

Correct answer: C

Ampulla is the wider part of oviduct and actual site for fertilization. Infundibulum is closer to the ovary.
9
Which one of the following statements is incorrect about menstrual cycle?
  1. A The first menstruation begins at puberty and is called menarche
  2. B Lack of menstruation may also occur due to some environmental factors like stress, poor health
  3. C Corpus luteum secretes large amounts of progesterone which is essential for maintenance of endometrium
  4. D In absence of fertilisation, corpus luteum degenerates in luteal phase and new follicles start developing immediately
Show answer & explanation

Correct answer: D

In absence of fertilization, corpus luteum degenerates in luteal phase but new follicles do not start develop immediately after its degeneration. During follicular phase, the primary follicles in the ovary grow to become fully mature Graafian follicle.
10
Embryo with 8 to 16 blastomeres is called
  1. A Polar body
  2. B Zygote
  3. C Morula
  4. D Ovum
Show answer & explanation

Correct answer: C

After cleavage 2, 4, 8, 16 daughter cells called blastomeres are formed.
11
Which of the following is constituent of semen?
  1. A Seminal plasma only
  2. B Sperm only
  3. C Seminal plasma along with sperm
  4. D Seminal plasma along with ovum
Show answer & explanation

Correct answer: C

Seminal plasma along with sperm constitute semen. Seminal plasma, contains seminal fluid, prostatic fluid and mucus from Cowper's gland.
12
Which cell organelle is energy source for swimming of sperms?
  1. A Centrioles
  2. B Nucleus
  3. C Flagella
  4. D Mitochondria
Show answer & explanation

Correct answer: D

Mitochondria are arranged in a helical manner in middle piece of sperm.
13
FSH : Sertoli cell :: LH : ________.
Complete the analogy by choosing the correct option
  1. A Sperm cell
  2. B Inner cell mass
  3. C Germ cell
  4. D Leydig cell
Show answer & explanation

Correct answer: D

Androgens stimulate the process of spermatogenesis.
14
Which of the following groups of hormones are produced in women only during pregnancy?
  1. A hCG, hPL, relaxin
  2. B Estrogen, progesterone, hCG
  3. C Cortisol, prolactin, thyroxine
  4. D Prolactin, progesterone, hCG
Show answer & explanation

Correct answer: A

hPL (human placental lactogen) has lactogenic properties, thus supporting prolactin from mother's pituitary during pregnancy. hCG (human chorionic gonadotrophin) maintains corpus luteum which secretes progesterone. Relaxin, also secreted by corpus luteum, facilitates parturition by softening the connective tissue of pubic symphysis.
15
Appearence of hair on the head in foetus occurs during
  1. A $5 ^ { \text {th } }$ month
  2. B $2 ^ { \text {nd } }$ month
  3. C $3 ^ { \text {rd } }$ month
  4. D $4 ^ { \text {th } }$ month
Show answer & explanation

Correct answer: A

Limbs and digits are formed by the end of $2 ^ { \text {nd } }$ month, external genitalia during $3 ^ { \text {rd } }$ month and body hairs during $6 ^ { \text {th } }$ month.
16
Duration of luteal phase in a woman whose menstrual cycle is of 34 days is
  1. A 20 days
  2. B 17 days
  3. C 14 days
  4. D 5 days
Show answer & explanation

Correct answer: C

Duration of Luteal phase is fixed and it lasts for 14 days. Ovulation will occur on $20 ^ { \text {th } }$ day in this woman
(34 - 14 = 20).
17
By the end of ________ the body is covered with fine hair, eye-lids separate and eyelashes are formed. Choose the option that fills the blank correctly.
  1. A First trimester
  2. B Second trimester
  3. C One month
  4. D Two months
Show answer & explanation

Correct answer: B

These structures develop at the end of 24 weeks i.e., second trimester. Placenta is well developed at the end of first trimester. Heart beat can be heard after one month.
18
Which structure lies at the upper junction of the two labia minora above the urethral opening?
  1. A Mons pubis
  2. B Labia majora
  3. C Oviduct
  4. D Clitoris
Show answer & explanation

Correct answer: D

Clitoris is a tiny finger-like structure, it is homologous to male's penis containing erectile tissue but not urethra.
19
Normal fertilization of sperm and ovum in human Female occurs in
  1. A Vagina
  2. B Ampulla
  3. C Cervix
  4. D Ovary
Show answer & explanation

Correct answer: B

Ovum released by ovary is transported to ampullary region where fertilization takes place.
20
The paired accessory gland of male reproductive system whose secretions contain fructose is
  1. A Bulbourethral gland
  2. B Seminal vesicle
  3. C Cowper's gland
  4. D Prostate gland
Show answer & explanation

Correct answer: B

Secretion of seminal vesicles constitutes 60-70% of seminal plasma.

Prostate gland is unpaired. Bulbourethral/cowper's gland secrete mucus.

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