31) The pituitary hormone that stimulates spermatogenesis is

A) FSH.

B) LH.

C) ACTH.

D) ADH.

E) GH.

32) ________ is characterized by failure of the testes to descend into the scrotum by the time of birth.

A) Impotence

B) Cryptorchidism

C) Sterility

D) Incontinence

E) Erectile dysfunction

33) Parasympathetic innervation of the penile arteries involves neurons that release ________ at their synaptic terminals.

A) nitric oxide

B) dopamine

C) serotonin

D) acetylcholine

E) norepinephrine

34) Contraction of the cremaster muscle

A) occurs when the testes are suddenly exposed to a cold environment.

B) produces an erection.

C) propels sperm through the urethra.

D) moves sperm through the ductus deferens.

E) moves the testes closer to the body cavity.

35) To become active, motile, and fully functional, sperm cells must undergo the process of ________.

A) emission

B) capacitation

C) mitosis

D) meiosis I

E) fertilization

36) Spermatogenesis begins

A) at puberty.

B) during embryogenesis.

C) at birth.

D) at age 3.

E) at age 7.

37) Which anterior pituitary lobe hormone targets the interstitial cells of the testes?

A) FSH

B) testosterone

C) progesterone

D) GnRH

E) LH

38) The following is a list of structures of the male reproductive tract.

1 – ductus deferens

2 – urethra

3 – ejaculatory duct

4 – epididymis

The correct order in which spermatozoa pass through these structures from the testes to the penis is

A) 1, 3, 4, 2.

B) 4, 3, 1, 2.

C) 4, 1, 2, 3.

D) 4, 1, 3, 2.

E) 1, 4, 3, 2.

39) Removal of the seminal glands would result in semen

A) that lacked sperm.

B) with a higher-than-normal pH.

C) with less fructose.

D) with no lubricating fluids.

E) that lacked androgens.

40) Capacitation

A) is stimulated by a substance secreted by the epididymis.

B) immobilizes sperm.

C) is responsible for the physical maturation of sperm.

D) occurs only within the male reproductive tract.

E) occurs after spermatozoa mix with secretions of the seminal glands.