Why does the shape of a man's sperm affect his fertility?
a. The shape affects the speed of the sperm.
b. The shape effects the direction that the sperm travel.
c. The shape affects the sperm's ability to penetrate the egg.
d. The shape affects how long the sperm can "swim" for.
ANS: C
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During lovemaking with his partner, Harry's penis becomes fully erect, his corona further enlarges, and his testicles are pulled up closely against his body. According to Masters and Johnson, Harry is in the _________ phase
a. excitement b. resolution c. desire d. plateau
Erectile dysfunction is defined as ____
a. impotence occurring at least once in a male's lifetime b. persistent inability to achieve or maintain an erection c. persistent inability to achieve an erection, independent of the ability to maintain an erection d. persistent inability to maintain an erection, independent of the ability to achieve an erection
During pregnancy, it is ideal for a woman of normal weight to double her calorie intake.
Answer the following statement true (T) or false (F)
Which of the following is true of the side-to-side position?
A. It is not ideal for prolonged intercourse. B. It is ideal for obese partners. C. It is dangerous for pregnant women. D. It cannot be used by heterosexual partners.