Hormonal regulation of spermatogenesis

Hormonal regulation of spermatogenesis - act together to...

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Hormonal regulation of spermatogenesis The production of sperm is regulated by hormones, as shown in Figure 2:  The hypothalamus begins secreting gonadotropin releasing hormone (GnRH) at  puberty. GnRH stimulates the anterior pituitary to secrete follicle stimulating hormone (FSH)  and luteinizing hormone (LH). LH stimulates the interstitial cells in the testes to produce testosterone and other  male sex hormones (androgens). (In males, LH is also called interstitial cell stimulating  hormone, or ICSH.) Testosterone produces the following effects: Testosterone stimulates the final stages of sperm development in the nearby  seminiferous tubules. It accumulates in these tissues because testosterone and FSH 
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Unformatted text preview: act together to stimulate sustentacular cells to release androgen-binding protein (ABP). ABP holds testosterone in these cells. Testosterone entering the blood circulates throughout the body, where it stimulates activity in the prostate gland, seminal vesicles, and various other target tissues. Testosterone and other androgens stimulate the development of secondary sex characteristics, those characteristics not directly involved in reproduction. These include the distribution of muscle and fat typical in adult males, various body hair (facial and pubic hair, for example), and deepening of the voice....
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