During their physiology class, the students are learning about the male reproductive system. What naturally occurring substance would the students learn is thought to affect only sperm production?

A) Estrogen
B) Testosterone
C) Gonadotropin-releasing hormone (GnRH)
D) Inhibin


D
Feedback:
Inhibin has been investigated for many years as a possible male birth control drug, because it is thought to affect only sperm production. Estrogen, testosterone, and GnRH have multiple effects on the body other than just sperm production.

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