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Human Reproduction · Question 103

AIPMT 2005MCQMedium📈 Topic in 50% papers+4−1
1

If mammalian ovum fails to get fertilized, which one of the following is unlikely?

  1. Corpus luteum will disintegrate
  2. Estrogen secretion further decreases
  3. Primary follicle starts developing
  4. Progesterone secretion rapidly declines

Answer

(2) Estrogen secretion further decreases

Solution

As per NCERT, in the absence of fertilisation the corpus luteum degenerates.

⇒ Progesterone secretion declines rapidly, the endometrium disintegrates and menstruation begins (a new cycle).

⇒ In the new cycle, primary follicles start developing into Graafian follicles under the influence of FSH and LH.

⇒ The growing follicles secrete estrogens, so estrogen secretion rises (it does not decrease further).

∴ 'Estrogen secretion further decreases' is unlikely.

Answer: (2)

AIPMT 2005

Keep practising — Human Reproduction

2

Ovulation in the human female normally takes place during the menstrual cycle

  1. At the beginning of the proliferative phase
  2. At the mid secretory phase
  3. Just before the end of the secretory cycle
  4. At the end of the proliferative phase
AIPMT 2004
3

Which of the following hormones is not a secretion product of human placenta?

  1. Estrogen
  2. Progesterone
  3. Prolactin
  4. Human chorionic gonadotropin
AIPMT 2004
4

Bartholin's glands are situated

  1. on the sides of the head of some amphibians
  2. at the reduced tail end of birds
  3. on either side of vagina in humans
  4. on either side of vas deferens in humans.
AIPMT 2003
5

During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called:

  1. Organizer phenomena
  2. Pattern formation
  3. Axis formation
  4. Anamorphosis
AIPMT 2003
6

Mainly which type of hormones control the menstrual cycle in human beings?

  1. FSH
  2. LH
  3. FSH, LH, estrogen
  4. progesterone
AIPMT 2002
7

What is true for cleavage?

  1. Size of embryo decreases
  2. Size of embryo increases
  3. Size of cells increases
  4. Size of cells decreases
AIPMT 2002
8

Which set is similar?

  1. Corpus luteum – Graafian follicles
  2. Sebum – Sweat
  3. Bundle of His – Pacemaker
  4. Vitamin B7 – Niacin
AIPMT 2001
9

Which set is similar?

  1. Vitamin B7 – Niacin
  2. Sebum – Sweat
  3. Corpus luteum – Graafian follicles
  4. Bundle of His – Pacemaker
AIPMT 2001
10

Cleavage in mammals is

  1. holoblastic equal
  2. holoblastic unequal
  3. superficial
  4. discoidal.
AIPMT 2000
11

Blastopore is the pore of:

  1. A.C.
  2. Archenteron
  3. Blastocoel
  4. Coelom
AIPMT 2000

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