Which one of the following statements is incorrect about menstrual cycle?

The first menstruation begins at puberty and is called menarche

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Lack of menstruation may also occur due to some environmental factors like stress and poor health

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Corpus luteum secretes large amounts of progesterone which is essential for maintenance of endometrium

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In absence of fertilisation, corpus luteum degenerates in luteal phase and new follicles start developing immediately

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Solution

The correct option is D In absence of fertilisation, corpus luteum degenerates in luteal phase and new follicles start developing immediately
In the absence of fertilisation, the corpus luteum degenerates in luteal phase. This causes disintegration of the endometrium leading to menstruation, marking a new cycle, not developing new follicles immediately.

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Similar questions

Q. Given below are the steps which occur when an egg is not fertilised.
Arrange them in order.
A) Menstruation occurs.
B) Endometrium degenerates.
C) Progestrone production stops.
D) Corpus luteum degenerates into corpus albicans.

Q. Read the following statements about menstrual cycle and select two correct statements.
(i) Lack of menstruation may be indicative of pregnancy.
(ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only.
(iii) LH surge induces ovulation.
(iv) If fertilisation occurs, corpus luteum degenerates immediately.

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.

In menstrual cycle one ovum is released from either ovaries and the remaining graffian follicle converts into corpus luteum which will secret progesterone for only 7 days but if pregnancy occurs then it secret progesterone for 3 months , in this scenario how the corpus luteum will secret RELAXIN at the parturition at 9 month if it is already died and replaced by placenta?

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