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Human Reproduction · Question 71

AIPMT 2012 (Prelims)MCQMedium📈 Topic in 50% papers+4−1
1

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was :

  1. High levels of FSH and LH in uterus to stimulate endometrial thickening
  2. High level of circulating HCG to stimulate estrogen and progesterone synthesis
  3. High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
  4. High level of circulating HCG to stimulate endometrial thickening

Answer

(2) High level of circulating HCG to stimulate estrogen and progesterone synthesis

Solution

During pregnancy the placenta secretes hCG (human chorionic gonadotropin), so the gonadotropin activity in the blood is mainly due to hCG; FSH and LH are kept low by high levels of estrogen and progesterone.

∵ hCG maintains the corpus luteum, which keeps on secreting estrogen and progesterone needed to maintain pregnancy.

∴ A high level of circulating hCG stimulating estrogen and progesterone synthesis is expected.

Answer: (2)

AIPMT 2012 (Prelims)

Keep practising — Human Reproduction

2

The Leydig's cells as found in the human body are the secretory source of

  1. Glucagon
  2. Androgens
  3. Progesterone
  4. Intestinal mucus
AIPMT 2012 (Prelims)
3

What happens during fertilization in humans after many sperms reach close to the ovum?

  1. Only two sperms nearest the ovum penetrate zona pellucida
  2. Secretions of acrosome help one sperm enter cytoplasm of ovum through zona pellucida
  3. All sperms except the one nearest to the ovum lose their tails
  4. Cells of corona radiata trap all the sperms except one.
AIPMT 2011 (Mains)
4

About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occur?

  1. 11th day
  2. 14th day
  3. 20th day
  4. 5th day
AIPMT 2011 (Mains)
5

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from :

  1. Vagina to uterus
  2. Testes to epididymis
  3. Epididymis to vas deferens
  4. Ovary to uterus
AIPMT 2011 (Prelims)
6

The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for :

  1. providing a secondary sexual feature for exhibiting the male sex
  2. maintaining the scrotal temperature lower than the internal body temperature
  3. escaping any possible compression by the visceral organs
  4. providing more space for the growth of epididymis
AIPMT 2011 (Prelims)
7

The figure given below depicts a diagrammatic sectional view of the female reproductive system of humans. Which one set of three parts out of I-VI have been correctly identified? [Figure]

  1. (I) Perimetrium, (II) Myometrium, (III) Fallopian tube
  2. (II) Endometrium, (III) Infundibulum, (IV) Fimbriae
  3. (III) Infundibulum, (IV) Fimbriae, (V) Cervix
  4. (IV) Oviducal funnel, (V) Uterus, (VI) Cervix
AIPMT 2011 (Prelims)
8

Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of

  1. Oxytocin from maternal pituitary
  2. Oxytocin from foetal pituitary
  3. Relaxin from placenta
  4. Estrogen from placenta
AIPMT 2010 (Mains)
9

In human female the blastocyst

  1. gets implanted into uterus 3 days after ovulation
  2. gets nutrition from uterine endometrial secretion only after implantation
  3. gets implanted in endometrium by the trophoblast cells
  4. forms placenta even before implantation
AIPMT 2010 (Mains)
10

Secretions from which one of the following are rich in fructose, calcium and some enzymes?

  1. Liver
  2. Pancreas
  3. Salivary glands
  4. Male accessory glands
AIPMT 2010 (Mains)
11

Sertoli cells are found in :

  1. ovaries and secrete progesterone
  2. adrenal cortex and secrete adrenaline
  3. seminiferous tubules and provide nutrition to germ cells
  4. pancreas and secrete cholecystokinin
AIPMT 2010 (Prelims)

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