The blood testosterone concentration is increased byHigh level of testosterone stimulating the testes to release more LH-High level of testosterone stimulating the hypothalamus-Hypothalamus stimulating the testes to release LH-LH stimulating interstitial cells to release testosterone-

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Standard X

Biology

Introduction to the Male Reproductive System

The blood tes...

Question

The blood testosterone concentration is increased by

High level of testosterone stimulating the hypothalamus

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Hypothalamus stimulating the testes to release LH

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LH stimulating interstitial cells to release testosterone

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High level of testosterone stimulating the testes to release more LH

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Solution

The correct option is C
LH stimulating interstitial cells to release testosterone

There are two important gonadotropins released from the pituitary - the luteinizing hormone or LH and follicle stimulating hormone or FSH. The LH stimulates the cells of the connective tissue present in between the seminiferous tubules in the testes called the interstitial cells or leydig cells to produce testosterone.

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Leydig cells or interstitial cells are present in testes. These cells lie between the seminiferous tubules and produce testosterone.

Which gland stimulates testes to release testosterone?

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).

When testosterone levels are low, gonadotropin-releasing hormone (GnRH) is released by the hypothalamus, which in turn stimulates the pituitary gland to release FSH and LH. FSH and LH then stimulate the testis to produce testosterone.
How is homeostasis achieved when testosterone levels begin to rise?

What stimulates interstitial cells to produce testosterone?

Q. Hormones from pituitary gland stimulate ................... to release testosterone.

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