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Human Reproduction · Question 76

AIPMT 2011 (Prelims)MCQEasy📈 Topic in 25% papers+4−1
1

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

Answer

(2) maintaining the scrotal temperature lower than the internal body temperature

Solution

As per NCERT, the testes are situated outside the abdominal cavity within a pouch called scrotum.

∵ The scrotum helps in maintaining the temperature of the testes 2–2.5 lower than the normal internal body temperature,

∴ this lower temperature is necessary for spermatogenesis.

Answer: (2)

AIPMT 2011 (Prelims)

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2

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)
3

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)
4

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)
5

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)
6

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)
7

Vasa efferentia are the ductules leading from :

  1. Testicular lobules to rete testis
  2. Rete testis to vas deferens
  3. Vas deferens to epididymis
  4. Epididymis to urethra
AIPMT 2010 (Prelims)
8

Seminal plasma in human males is rich in

  1. fructose and calcium
  2. glucose and calcium
  3. DNA and testosterone
  4. ribose and potassium
AIPMT 2010 (Prelims)
9

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

  1. Fourth month
  2. Fifth month
  3. Sixth month
  4. Third month
AIPMT 2010 (Prelims)
10

The second maturation division of the mammalian ovum occurs

  1. Shortly after ovulation before the ovum makes entry into the Fallopian tube
  2. Until after the ovum has been penetrated by a sperm
  3. Until the nucleus of the sperm has fused with that of the ovum
  4. in the Graafian follicle following the first maturation division
AIPMT 2010 (Prelims)
11

Which one of the following statements about human sperm is correct?

  1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
  2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
  3. Acrosome serves as a sensory structure leading the sperm towards the ovum
  4. Acrosome serves no particular function
AIPMT 2010 (Prelims)

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