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Human Reproduction · Question 34

NEET (UG) 2020MCQMedium📈 Topic in 50% papers+4−1
1

Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?

  1. Low concentration of FSH
  2. High concentration of Progesterone
  3. Low concentration of LH
  4. High concentration of Estrogen

Answer

(4) High concentration of Estrogen

Solution

As per NCERT, during the follicular phase the growing follicles secrete increasing amounts of estrogen.

⇒ High concentration of estrogen around the middle of the cycle (about the 14th day) induces a rapid secretion of LH from the anterior pituitary (LH surge).

⇒ The LH surge induces rupture of the Graafian follicle and thereby the release of the ovum (ovulation).

∴ High estrogen level leads to ovulation; low FSH or low LH would not, and high progesterone occurs only in the luteal phase after ovulation.

Answer: (4)

NEET (UG) 2020

Keep practising — Human Reproduction

2

Match the following columns and select the correct option.

  1. (A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
  2. (A)-(i), (B)-(iv), (C)-(ii), (D)-(iii)
  3. (A)-(iv), (B)-(iii), (C)-(i), (D)-(ii)
  4. (A)-(iii), (B)-(ii), (C)-(iv), (D)-(i)
NEET (UG) 2020
3

Extrusion of second polar body from egg nucleus occurs :

  1. Before entry of sperm into ovum
  2. Simultaneously with first cleavage
  3. After entry of sperm but before fertilization
  4. After fertilization
NEET (UG) 2019
4

Select the correct sequence for transport of sperm cells in male reproductive system :

  1. Seminiferous tubules Vasa efferentia Epididymis Inguinal canal Urethra
  2. Testis Epididymis Vasa efferentia Vas deferens Ejaculatory duct Inguinal canal Urethra Urethral meatus
  3. Testis Epididymis Vasa efferentia Rete testis Inguinal canal Urethra
  4. Seminiferous tubules Rete testis Vasa efferentia Epididymis Vas deferens Ejaculatory duct Urethra Urethral meatus
NEET (UG) 2019
5

Hormones secreted by the placenta to maintain pregnancy are

  1. hCG, hPL, progestogens, prolactin
  2. hCG, hPL, estrogens, relaxin, oxytocin
  3. hCG, hPL, progestogens, estrogens
  4. hCG, progestogens, estrogens, glucocorticoids
NEET 2018
6

The difference between spermiogenesis and spermiation is

  1. in spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed
  2. in spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed
  3. in spermiogenesis spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed
  4. in spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules
NEET 2018
7

The amnion of mammalian embryo is derived from

  1. ectoderm and mesoderm
  2. endoderm and mesoderm
  3. mesoderm and trophoblast
  4. ectoderm and endoderm
NEET 2018
8

Match the items given in column I with those in column II and select the correct option given below.

  1. (a)-(i), (b)-(ii), (c)-(iii)
  2. (a)-(i), (b)-(iii), (c)-(ii)
  3. (a)-(ii), (b)-(iii), (c)-(i)
  4. (a)-(iii), (b)-(i), (c)-(ii)
NEET 2018
9

A temporary endocrine gland in the human body is

  1. corpus cardiacum
  2. corpus luteum
  3. corpus allatum
  4. pineal gland.
NEET 2017
10

Capacitation occurs in

  1. epididymis
  2. vas deferens
  3. female reproductive tract
  4. rete testis
NEET 2017
11

Changes in GnRH pulse frequency in females is controlled by circulating levels of

  1. progesterone only
  2. progesterone and inhibin
  3. estrogen and progesterone
  4. estrogen and inhibin.
NEET 2016 (Phase 1)

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