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B
LH
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C
LTH
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D
Vasopressin
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Solution
The correct option is A FSH At puberty, the hypothalamus begins to secrete gonadotropin-releasing hormone (GnRH). GnRH stimulates the anterior pituitary to secrete the gonadotropic hormones follicle-stimulating hormone (FSH) and luteinizing hormone (LH). Both FSH and LH are glycoproteins that use cyclic AMP as a second messenger. FSH stimulates Sertoli cells to secrete androgen-binding protein (ABP) and other signaling molecules that are necessary for spermatogenesis. LH stimulates the interstitial cells to secrete testosterone.