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Human Reproduction · Question 61

AIPMT 2014MCQMedium📈 Topic in 50% papers+4−1
1

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.

Answer

(3) High level of hCG stimulates the synthesis of estrogen and progesterone.

Solution

As per NCERT, during pregnancy the levels of hCG, hPL, estrogens and progestogens increase several folds in the maternal blood.

⇒ hCG secreted by the placenta maintains the corpus luteum, so it keeps on secreting estrogen and progesterone needed for the maintenance of pregnancy.

∵ FSH and LH levels stay low during pregnancy (high progesterone and estrogen inhibit their release), options (1) and (2) are wrong; the endometrium is thickened by estrogen and progesterone, not directly by hCG.

Answer: (3)

AIPMT 2014

Keep practising — Human Reproduction

2

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
3

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
4

Menstrual flow occurs due to lack of :

  1. Progesterone
  2. FSH
  3. Oxytocin
  4. Vasopressin
NEET 2013
5

The foetal ejection reflex in humans triggers the release of

  1. oxytocin from foetal pituitary
  2. human chorionic gonadotropin (hCG) from placenta
  3. oxytocin from maternal pituitary
  4. human placental lactogen (hPL) from placenta
NEET 2013 (Karnataka)
6

The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/ characteristic. [Figure]

  1. A- Tertiary follicle - Forms Graafian follicle
  2. B- Corpus luteum - Secretes progesterone
  3. A- Primary oocyte - It is in the prophase I of the meiotic division
  4. B- Corpus luteum - Secretes estrogen
NEET 2013 (Karnataka)
7

The secretory phase in the human menstrual cycle is also called :

  1. Follicular phase lasting for about 6 days
  2. Luteal phase and lasts for about 13 days
  3. Follicular phase and lasts for about 13 days
  4. Luteal phase and lasts for about 6 days
AIPMT 2012 (Mains)
8

Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two, together. [Figure]

  1. Developmental stage Late morula, Site of occurrence Middle part of Fallopian tube
  2. Developmental stage Blastula, Site of occurrence End part of Fallopian tube
  3. Developmental stage 8-celled morula, Site of occurrence Starting point of Fallopian tube
  4. Developmental stage Blastocyst, Site of occurrence Uterine wall
AIPMT 2012 (Mains)
9

Which one of the following statements is false in respect of viability of mammalian sperm?

  1. Viability of sperm is determined by its motility
  2. Sperms must be concentrated in a thick suspension
  3. Sperm is viable for only up to 24 hours
  4. Survival of sperm depends on the pH of the medium and is more active in alkaline medium
AIPMT 2012 (Prelims)
10

Signals for parturition originate from :

  1. Placenta only
  2. Fully developed foetus only
  3. Both placenta as well as fully developed foetus
  4. Oxytocin released from maternal pituitary
AIPMT 2012 (Prelims)
11

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
AIPMT 2012 (Prelims)

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