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Human Reproduction · Question 67

AIPMT 2012 (Mains)MCQEasy📈 Topic in 50% papers+4−1
1

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

Answer

(2) Luteal phase and lasts for about 13 days

Solution

As per NCERT, after ovulation (about the 14th day of a 28-day cycle) the ruptured Graafian follicle forms the corpus luteum, which secretes large amounts of progesterone.

⇒ The post-ovulatory phase is called the luteal phase (secretory phase), as the endometrium becomes secretory under progesterone.

∴ It extends from about day 15 to day 28, i.e. about 13–14 days.

Answer: (2)

AIPMT 2012 (Mains)

Keep practising — Human Reproduction

2

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)
3

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)
4

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)
5

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)
6

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)
7

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)
8

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)
9

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)
10

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)
11

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)

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