Sex Hormones Involved In The Male Reproductive System

Question 1

GnRH specs

Answer 1

Increased prod. at the star of puberty
Stimulates HP to cause AP to release FSH & LH

Question 2

FSH in Males

Answer 2

Stimulates development of sex organs as well as spermatogenesis
Causes STs to release inhibin
Acts on AP to inhibit prod. of FSH (neg. feedback)
As levels of inhibin decrease, the testes will begin to release more FSH

Question 3

LH in Males

Answer 3

Stimulates the production of testosterone
Testos. Will act on the AP to inhibit the prod. Of LH.
Testos. Acts on various tissues to complete the dev. of sex organs and sexual characteristics
Responsible for promoting changes in muscle development, formation of facial hair

Question 4

Aging (Andropause) and Hormones

Answer 4

Men can remain very fertile for their entire life but level of testosterone. will decline as they age