What do studies of the relationship between exercise and sleep reveal about the properties of sleep?
A. Although sleep provides the body with rest, it seems unlikely that this is the primary function of sleep.
B. Exercise increases overall sleep time, decreases the efficiency of stage two sleep, and increases time spent in REM sleep.
C. Exercise vastly improves the quality of REM sleep, but does not extend overall sleep time.
D. Reduced exercise is associated with increased sleep time.
Answer: A
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Tina is 14 years old and having her first child and has a higher likelihood of a premature delivery because
a. she has an immature reproductive system. b. this is her first child. c. the father is also a teenager. d. she is having a single birth (rather than twins).
Which of the following statements illustrates the cognitive disconnection aspect of disengagement?
a. "She's so unresponsive and uninvolved—it's like we've become strangers" b. "I feel nothing for her anymore" c. "I know he wants to talk, but I'm too busy" d. "She can go to the party by herself—I'm not interested"