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Standard X
Biology
Menstrual Cycle
Which of the ...
Question

Which of the following statements is correct regarding menstrual cycle?

A
LH induces rupturing of graafian follicle.
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B
Proliferative phase is characterised by the increased production of progesterone.
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C
Corpus luteum secrets large amount of estrogen.
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D
Both LH and FSH attain a peak level in secretory phase.
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Solution

The correct option is A LH induces rupturing of graafian follicle.
During follicular phase (proliferative phase), follicle stimulating hormone (FSH) secreted by the anterior lobe of the pituitary gland stimulates the ovarian follicle to secrete estrogens. Corpus luteum secretes a large amount of progesterone in the secretory phase. Both LH and FSH attain a peak level in the ovulatory phase (mid of the cycle).

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Q. Refer to the given schematic representation of menstrual cycle showing three phases I, II and Ill.
Select the option that correctly matches these phases with the following events.

(i) FSH secreted by the anterior pituitary stimulates the ovarian follicle to secrete estrogen which stimulates the proliferation of the endometrium.

(ii) LH secreted by the anterior pituitary stimulates the development of corpus luteum which secretes progesterone.

(iii) Reduced production of LH from anterior pituitary causes degeneration of corpus luteum, thereby progesterone production is reduced.

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Q. Which of the following statements are correct with respect to hormones involved in the reproductive cycle of human females?
a. Both LH and FSH attain a peak level in the middle of cycle.
b. Estrogen is essential for the maintenance of the endometrium.
c. Uterine endometrium proliferates in presence of ovarian hormone.
d. LH surge induces rupture of Graafian follicle.
​​​​​​​[0.7 mark]
Q. Match column 1 to column 2:
Column 1 Column 2
a FSH 1 Prepare endometrium for implantation
b LH 2 Develops female secondary sexual characters
c Progesterone 3 Maturation of Graafian follicle
d Estrogen 4 Development of corpus luteum

Q.
Column I Column II
(a) FSH (i) Prepare endometrium for implantation
(b) LH (ii) Develop female secondary sexual characters
(c) Progesterone (iii) Contraction of uterine wall
(d) Estrogen (iv) Development of corpus luteum
(v) Maturation of Graafian follicle
Match the hormone in column I with their function in column II and choose the correct combination from the following.
Q. Assertion :Corpus luteum is produced by Graafian follicle after ovulation. Reason: It secretes estrogen which is necessary to maintain pregnancy.
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