Which of the following statements about REM sleep is true?
A) REM sleep is vital for growth of the central nervous system.
B) During REM sleep, the body is almost motionless.
C) REM sleep accounts for 20 percent of a newborn baby's sleep time.
D) During REM sleep, the heart rate, breathing, and brain-wave activity are slow and even.
A
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Which of the following is a common cause for worsening one's insomnia?
a. overuse of cocaine b. early morning exercise c. inappropriate use of sleeping pills d. eating a large meal at dinner e. collapse of the airways to the lungs
Which of the following behaviors represents a type of social phobia?
a) Melanie only leaves her house if one of her sisters is willing to go with her. b) Brad has been unable to graduate from college because he is terrified of taking a required speech class. c) Ellie faints whenever a doctor needs to give her an injection. d) Selma is so afraid of spiders that she refuses to go on picnics in the park.