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Human Reproduction · Question 84

AIPMT 2010 (Prelims)MCQEasy📈 Topic in 50% papers+4−1
1

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

Answer

(2) Fifth month

Solution

As per NCERT, in human pregnancy:

⇒ after one month, the heart of the embryo is formed;

⇒ by the end of the second month, limbs and digits develop;

⇒ by the end of 12 weeks (first trimester), most major organ systems are formed;

⇒ during the fifth month, the first movements of the foetus and the appearance of hair on the head are usually observed;

⇒ by the end of 24 weeks (second trimester), the body is covered with fine hair, eyelids separate and eyelashes are formed.

Answer: (2)

AIPMT 2010 (Prelims)

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2

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)
3

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)
4

Which one of the following statements about morula in humans is correct?

  1. It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
  2. It has far less cytoplasm as well as less DNA than in an uncleaved zygote
  3. It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
  4. It has more cytoplasm and more DNA than an uncleaved zygote
AIPMT 2010 (Prelims)
5

The part of Fallopian tube closest to the ovary is

  1. Isthmus
  2. Infundibulum
  3. Cervix
  4. Ampulla
AIPMT 2010 (Prelims)
6

Seminal plasma in humans is rich in :

  1. Fructose, calcium and certain enzymes
  2. Fructose and certain enzymes but poor calcium
  3. Glucose and certain enzymes but has no calcium
  4. Fructose and calcium but has no enzyme
AIPMT 2009
7

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
AIPMT 2009
8

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
9

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
10

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
11

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

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