All of the following statements about the menstrual cycle are true except

Luteinizing hormone is produced by the pituitary in response to GNRH from the hypothalamus.

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Luteinizing hormone acts on the follicle, causing ovulation.

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Birth control pills that contain estrogen and progesterone would inhibit the secretion of FSH by the pituitary.

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The endometrium builds up to its maximum thickness soon after the release of FSH.

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Progesterone helps maintain the corpus luteum after ovulation.

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Solution

The correct option is C The endometrium builds up to its maximum thickness soon after the release of FSH.
GnRH (gonadotropin releasing hormone) of hypothalamus stimulate the release of gonadotropins (FSH and LH) FSH is responsible for the development of follicles in ovary while LH promotes maturation of Graffian follicle. Developing follicles secrete estrogen and progesterone. LH surge at day 14 of menstrual cycle causes rupturing of Graffian follicle and released of the ovum (ovulation). The ruptured graffian follicle develops into Corpus luteum. Progesterone is secreted by corpus luteum (the ovulated follicle) during first three months of pregnancy and by the placenta during next 6 months. It prepares the uterus for implantation, thickens the uterine endometrium during pregnancy. Thus, the correct answer is option D.

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Similar questions

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. Complete the paragraph with the help of words given in the bracket. (Luteinizing hormone, endometrium of uterus, follicle stimulating hormone, estrogen, progesterone, corpus luteum)

Growth of follicles present in the ovary occurs under the effect of ----- This follicle secretes estrogen. -- --- - -- -- -- grows / regenerates under the effect of estrogen. Under the effect of --- ---, fully grown up follicle bursts, ovulation occurs and -- --- -- -- is formed from remaining part of follicle. It secrets --- --- -- -- and --- --- -- -- --. Under the effect of these hormones, glands of -- -- -- -- are activated and it becomes ready for implantation.

Match the following menstrual cycle affecting hormones and their site of production?
$\begin{matrix} HORMONE & SITE OF PRODUCTION 1) FSH-follicle stimulating hormone & a) Pituitary Gland 2) Oestrogen & b) Corpus luteum 3) LH-leuteinising hormone & c) Pituit Gland 4) Progesterone & d) Graafian follicle \end{matrix}$

Q. Which of the following hormones is secreted by implanted blastocyst, that acts on the corpus luteum in the ovary, stimulating the body to produce estrogens and progesterone to maintain the uterine lining?

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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