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Standard XII
Biology
The Growth Hormone and Its Importance
Question

Select the incorrect statement
  1. LH and FSH decrease gradually during the follicular phase.
  2. LH triggers secretion of androgens from the leydig cells
  3. LH triggers ovulation in ovary.
  4. FSH stimulates the sertoli cells which help in spermiogenesis

A
LH and FSH decrease gradually during the follicular phase.
B
LH triggers secretion of androgens from the leydig cells
C
LH triggers ovulation in ovary.
D
FSH stimulates the sertoli cells which help in spermiogenesis
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Solution
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LH is a Luteinizing hormone produced by the gonadotropic cells in the anterior pituitary gland. It plays an important role in puberty, menstruation, and fertility. It triggers ovulation and development of the corpus luteum. In male, LH triggers the secretion of androgen called as testosterone from the Leydig cells. FSH is follicle-stimulating hormone produced by gonadotropic cells in the anterior pituitary gland. It helps in regulation of development, growth, pubertal maturation and reproductive processes of the body. It stimulates the Sertoli cells of the testicles and helps in spermatogenesis, production of sperm. During the follicular phase, the LH and FSH increase gradually. They stimulate follicular development and estrogen secretion by follicular cells.
Thus, the correct answer is 'LH and FSH decrease gradually during the follicular phase.'

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Similar Questions
Q1

Identify the correct match of column I,II and III.


Column - I


Column -II


Column - III

sertoli cells

a

LH

i

spermatogenesis

leydig's cells

b

inhibin

ii

formation of the ovarian follicle

anterior pituitary

c

testosterone

iii

suppress FSH

ovary

d

estrogen

iv

ovulation

View Solution
Q2
In males, FSH stimulates ________ to secrete androgen binding protein.
View Solution
Q3
Find the correct answers about LH in females.
1. Facilitates luteinisation of granulosa cells of ovulated follicle
2. Called ovulation hormone
3. Helps in milk secretion
4. Activates Leydig cells to secrete androgen
View Solution
Q4
How many statements are correct among following statements?
(a) Breast is secondary sex organ.
(b) FSH stimulates Leydig cells.
(c) Sertoli cells are immuno-competent cells.
(d) Trophoblast cells form placenta during blastula stage.
(e) IUD can be used as emergency contraceptive method.
View Solution
Q5

Identify true/false statements. Correct each false statement to make it true.

(a) Androgens are produced by Sertoli cells. (True/ False)

(b) Spermatazoa get nutrition from Sertoli cells. (True/ False)

(c) Leydig cells are found in ovary. (True/ False)

(d) Leydig cells synthesis androgens. (True/ False)

(e) Oogenesis takes place in corpus luteum. (True/ False)

(f) Menstrual cycle ceases during pregnancy. (True/ False)

(g) Presence or absence of hymen is not a reliable indicator of virginity or sexual experience. (True/ False)

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