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Menstrual Cycle

Which of the ...

Question

Which of the following is the correct matching of the events occurring during menstrual cycle?

A

Menstruation

\times

Breakdown of myometrium and ovum not fertilized

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B

Ovulation

\times

LH and FSH attain peak level and sharp fall in the secretion of progesterone

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C

Proliferative phase

\times

Rapid regeneration of myometrium and maturation of Graafian follicle

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D

Development of corpus

\times

Secretory phase and increased secretion of progesterone luteum

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Solution

The correct option is D Development of corpus $\times$ Secretory phase and increased secretion of progesterone luteum
Secretory phase is also called as the leutal phase. The luteinizing hormone or LH is secreted by the anterior lobe of pituitary gland. LH causes ovulation. LH stimulates cells of the ovarian follicles to develop corpus leutum. Corpus secretes large amount of progesterone.

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Q. Why LH secretion during follicular phase is so high then FSH as LH secretion stimulate the corpus luteum to release progesterone thus LH should be high at luteal phase where corpus luteal is formed in luteal phase so LH secretion should attains peak level at luteal phase

Q. Some important events that occur during the menstrual cycle are given below. Arrange the events in a proper sequence and select the correct option.
(i) Proliferation of endometrial wall
(ii) LH surge
(iii) Secretion of estrogen
(iv) Secretion of progesterone
(v) Ovulation
(vi) Growth of corpus luteum
(vi) Degeneration of corpus luteum
(vii) Menstruation

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.

Q. Observe the diagram of menstrual cycle and answer the following questions:
(1) What is the period of menstruation?
(2) On which day does ovulation occur during menstrual cycle?
(3) During which period is corpus luteum active during menstrual cycle? Which hormones are secreted by corpus luteum ?
(4) In menstrual cycle which reproductive organs undergo changes?
(5) Which period is said to be period of regeneration of endometrium?
(6) Which period is said to be period of secretions of glands in the endometrium?

Q. Given below is the unorganized list of some
important events in the human female
reproductive cycle. Identify the correct
sequence of these events and select the
correct option.
(i) Secretion of FSH
(ii) Growth of corpus luteum
(iii) Growth of the follicle and oogenesis
(iv) Ovulation
(v) Sudden increase in the levels of LH

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