1.The production of testosterone in the interstitial cells of Leydig is stimulated by

A.follicle-stimulating hormone.
B.relaxin.
C.inhibin.
D.luteinizing hormone.
E.progesterone.

2.In the male, the hormone inhibin is produced in the

A.interstitial cells of Leydig.
B.Sertoli cells.
C.hypothalamus.
D.spermatogonia.
E.pituitary.

3.The terminal (final, before exit) duct of the male reproductive system is the

A.ejaculatory duct.
B.ductus deferens.
C.urethra.
D.ureter.
E.penis.