A man never initiates sex with his partner, although when she initiates with him he is sexually responsive (has an erection and eventually ejaculates). According to Kaplan, this man is having difficulty with the ____ phase of sexual response

A man has problems sleeping. He rarely falls asleep quickly, is frequently aroused during sleep, and wakens too early in the morning. It is most likely that the man is suffering from

a. insomnia. b. narcolepsy. c. sleep apnea. d. nightmares.

Joe tends to move around a lot in his sleep. Most likely he is doing this during:

a. Stage 3 or 4 sleep b. Slow wave sleep c. Delta wave activity d. All of the above