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The Reproductive Syste5

The Reproductive Syste5 - o Testosterone causes enlargement...

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The Reproductive System Physiology of Male Reproduction Regulation of Sex Hormone Secretion o GnRH is produced in the hypothalamus and is released in surges. o GnRH stimulates release of LH and FSH from the anterior pituitary. LH stimulates the interstitial cells to produce testosterone. FSH binds to Sertoli cells and stimulates spermatogenesis. Puberty o Before puberty small amounts of testosterone inhibit GnRH release. o During puberty testosterone does not completely suppress GnRH release, resulting in increased production of FSH, LH, and testosterone. Effects of Testosterone
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Unformatted text preview: o Testosterone causes enlargement of the genitals and is necessary for spermatogenesis. o Testosterone is responsible for the development of secondary sex characteristics. Male Sexual Behavior and the Male Sex Act o Testosterone is required for normal sex drive. o Stimulation of the sexual act can be tactile or psychological. o Afferent impulses pass to the sacral region of the spinal cord. o Efferent stimulation causes erection, mucus production, emission, and ejaculation. o The most common cause of infertility is a low sperm cell count....
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