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Human Reproduction · Question 90

AIPMT 2009MCQMedium📈 Topic in 50% papers+4−1
1

Which one of the following is the correct matching of the events occurring during menstrual cycle?

  1. Ovulation: LH and FSH attain peak level and sharp fall in the secretion of progesterone
  2. Menstruation: Breakdown of myometrium and ovum not fertilised
  3. Secretory phase: Development of corpus luteum and increased secretion of progesterone
  4. Proliferative phase: Rapid regeneration of myometrium and maturation of Graafian follicle

Answer

(3) Secretory phase: Development of corpus luteum and increased secretion of progesterone

Solution

(1) At ovulation LH and FSH reach their peak (LH surge), but progesterone is still low; its level rises only after ovulation, so there is no sharp fall in progesterone.

(2) Menstruation is the breakdown of the endometrial lining (not the myometrium) when the ovum is not fertilised.

(3) As per NCERT, in the luteal (secretory) phase the ruptured Graafian follicle transforms into the corpus luteum, which secretes large amounts of progesterone needed to maintain the endometrium. ⇒ Correct.

(4) In the proliferative (follicular) phase the endometrium (not the myometrium) regenerates through proliferation, while the follicle matures into a Graafian follicle.

Answer: (3)

AIPMT 2009

Keep practising — Human Reproduction

2

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

  1. A - Ureter, B - Seminal vesicle, C - Prostate, D - Bulbourethral gland
  2. A - Vas deferens, B - Seminal vesicle, C - Prostate, D - Bulbourethral gland
  3. A - Vas deferens, B - Seminal vesicle, C - Bulbourethral gland, D - Prostate
  4. A - Ureter, B - Prostate, C - Seminal vesicle, D - Bulbourethral gland
AIPMT 2009
3

Foetal ejection reflex in human female is induced by

  1. Pressure exerted by amniotic fluid
  2. Differentiation of mammary glands
  3. Release of oxytocin from pituitary
  4. Fully developed foetus and placenta
AIPMT 2009
4

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:

  1. spermatocyte - spermatogonia - spermatid - sperms
  2. spermatogonia - spermatid - spermatocyte - sperms
  3. spermatid - spermatocyte - spermatogonia - sperms
  4. spermatogonia - spermatocyte - spermatid - sperms
AIPMT 2009
5

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

  1. Retention of well-developed corpus luteum
  2. Maintenance of high concentration of sex hormones in the blood stream
  3. Maintenance of the hypertrophical endometrial lining
  4. Fertilisation of the ovum
AIPMT 2009
6

A change in the amount of yolk and its distribution in the egg will affect:

  1. Fertilisation
  2. Pattern of cleavage
  3. Formation of zygote
  4. Number of blastomeres produced
AIPMT 2009
7

In humans, at the end of the first meiotic division, the male germ cells differentiate into the:

  1. secondary spermatocytes
  2. spermatogonia
  3. primary spermatocytes
  4. spermatids
AIPMT 2008
8

Which one of the following statements is incorrect about menstruation?

  1. The beginning of the cycle of menstruation is called menarche
  2. At menopause in the female, there is especially abrupt increase in gonadotropic hormones
  3. The menstrual fluid can easily clot
  4. During normal menstruation about 40 ml blood is lost
AIPMT 2008
9

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?

  1. Yolk sac
  2. Amnion
  3. Chorion
  4. Allantois
AIPMT 2008
10

Which part of ovary in mammals acts as an endocrine gland after ovulation?

  1. Stroma
  2. Vitelline membrane
  3. Germinal epithelium
  4. Graafian follicle
AIPMT 2007
11

Sertoli cells are regulated by the pituitary hormone known as-

  1. LH
  2. FSH
  3. GH
  4. Prolactin
AIPMT 2006

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