Describe the endocrine system's regulation of the anatomy and physiology of the male reproductive system, including...

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Medical Sciences

Describe the endocrine system's regulation of the anatomy andphysiology of the male reproductive system, including maturation atpuberty, formation of sperm, and the development and maintenance ofsecondary sex characteristics.

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AnsREGULATION OF MALE SEXUAL FUNCTIONS BY ENDOCRINE HORMONES A major share of the control of sexual functions in both the male and the female begins with secretion of gonadotropinreleasing hormone GnRH by the hypothalamus This hormone in turn stimulates the anterior pituitary gland to secrete two other hormones called gonadotropic hormones 1 luteinizing hormone LH and 2 folliclestimulating hormone FSH In turn LH is the primary stimulus for the secretion of testosterone by the testes and FSH mainly stimulates spermatogenesis LH and FSH are glycoproteins They exert their effects on their target tissues in the testes mainly by activating the cyclic adenosine monophosphate second messenger system which in turn activates specific enzyme systems in the respective cells Regulation of Testosterone Production by Luteinizing Hormone Testosterone is secreted by the interstitial cells of Leydig in the testes but only when they are stimulated by LH from the anterior pituitary gland Furthermore the quantity of testosterone that is secreted increases approximately in direct proportion to the amount of LH that is available Regulation of Spermatogenesis by FollicleStimulating Hormone and Testosterone Inhibin FSH binds with specific FSH receptors attached to the Sertoli cells in the seminiferous tubules which causes the Sertoli cells to grow and See Answer

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