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Standard VIII

Biology

Menstrual Cycle

GnRH is secre...

Question

GnRH is secreted by _____and it stimulates anterior pituitary to release_.

hypothalamus, oxytocin

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hypothalamus, FSH and LH

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posterior pituitary, FSH and LH

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hypothalamus, vasopressin

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Solution

The correct option is B hypothalamus, FSH and LH
GnRH (Gonadotropin releasing hormone) is secreted by the hypothalamus and it stimulates the anterior pituitary gland to release the gonadotropins. FSH and LH are gonadotropins that are concerned with the growth and activity of gonads.

FSH plays a vital role in the development of ovarian follicles.

LH induces ovulation and development of corpus luteum.

Vasopressin and oxytocin are stored and released by the posterior pituitary.

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Q. Testosterone is a steroid hormone produced by all vertebrate animals and, in humans and other mammals, it is secreted in large amounts by the testes of males and to a much lesser extent, the ovaries of females. In adult males, testosterone plays a key role in the development of reproductive organs and it promotes the secondary sexual characteristics of body and facial hair, increased muscle and bone mass, and a deep voice. Testosterone, like all hormones, works via long distance signaling and is regulated by other hormones as illustrated below:

Figure 1:

Testosterone regulation by cooperation between the hypothalamus, pituitary, and testicular endocrine glands. The major regulatory hormones involved are luteinizing hormone (LH), follicle-stimulating hormone (FSH) and gonadotropin-releasing hormone (GnRH).

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Menstrual Cycle

Standard VIII Biology

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GnRH is secreted by ___________and it stimulates anterior pituitary to release_______.

GnRH is secreted by _____and it stimulates anterior pituitary to release_.