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Human Reproduction · Question 53

AIPMT 2015MCQMedium📈 Topic in 50% papers+4−1
1

Which of the following events is not associated with ovulation in human life?

  1. Release of secondary oocyte
  2. LH surge
  3. Decrease in estradiol
  4. Full development of Graafian follicle

Answer

(3) Decrease in estradiol

Solution

As per NCERT, during the follicular phase the growing follicles secrete increasing amounts of estrogens (estradiol); LH and FSH attain a peak in the middle of the cycle (about the 14th day). This rapid secretion of LH (LH surge) induces rupture of the fully developed Graafian follicle and thereby the release of the ovum (secondary oocyte), i.e., ovulation.

∵ The estradiol level is high (at its peak) just before ovulation, which triggers the LH surge.

∴ A decrease in estradiol is not associated with ovulation.

Answer: (3)

AIPMT 2015

Keep practising — Human Reproduction

2

Ectopic pregnancies are referred to as

  1. implantation of defective embryo in the uterus
  2. pregnancies terminated due to hormonal imbalance
  3. pregnancies with genetic abnormality
  4. implantation of embryo at site other than uterus.
AIPMT 2015
3

Which of the following cells during gametogenesis is normally diploid?

  1. Spermatogonia
  2. Secondary polar body
  3. Primary polar body
  4. Spermatid
AIPMT 2015 (Cancelled)
4

Capacitation refers to changes in the

  1. ovum after fertilisation
  2. sperm after fertilisation
  3. sperm before fertilisation
  4. ovum before fertilisation
AIPMT 2015 (Cancelled)
5

Hysterectomy is surgical removal of

  1. vas deferens
  2. mammary glands
  3. uterus
  4. prostate gland
AIPMT 2015 (Cancelled)
6

Which of these is not an important component of initiation of parturition in humans?

  1. Release of oxytocin
  2. Release of prolactin
  3. Increase in estrogen and progesterone ratio
  4. Synthesis of prostaglandins
AIPMT 2015 (Cancelled)
7

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

  1. urethra
  2. ureter
  3. vas deferens
  4. vasa efferentia
AIPMT 2014
8

The main function of mammalian corpus luteum is to produce

  1. estrogen only
  2. progesterone
  3. human chorionic gonadotropin
  4. relaxin only
AIPMT 2014
9

Select the correct option describing gonadotropin activity in a normal pregnant female.

  1. High level of FSH and LH stimulates the thickening of endometrium.
  2. High level of FSH and LH facilitates implantation of the embryo.
  3. High level of hCG stimulates the synthesis of estrogen and progesterone.
  4. High level of hCG stimulates the thickening of endometrium.
AIPMT 2014
10

What is the correct sequence of sperm formation?

  1. Spermatogonia, spermatozoa, spermatocytes, spermatids
  2. Spermatogonia, spermatocytes, spermatids, spermatozoa
  3. Spermatids, spermatocytes, spermatogonia, spermatozoa
  4. Spermatogonia, spermatocytes, spermatozoa, spermatids
NEET 2013
11

Which of the following is not the function of placenta?

  1. Facilitates supply of oxygen and nutrients to embryo
  2. Secretes estrogen
  3. Facilitates removal of carbon dioxide and waste material from embryo
  4. Secretes oxytocin during parturition
NEET 2013

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