Why doesn’t semen enter the urinary bladder during ejaculation?

A) The smooth muscle sphincter at the base of the urinary bladder closes.

B) There is no common duct between the reproductive system and the urinary system.

C) There is no urge to urinate during sexual intercourse because of the suppression of LH by

testosterone buildup in the blood.

D) Ejaculation is a parasympathetic reflex resulting in no response by urinary contraction

muscles.

15)

16) A boy who has not passed through puberty sustains an injury to his anterior pituitary such that

FSH is no longer released, but LH is normal. After he grows to maturity, one would expect that he

would ________.

A) have impaired function of interstitial cells B) be unable to produce viable sperm

C) be impotent (unable to have an erection) D) not develop secondary sex characteristics

16)

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