In a study of a group of healthy college students who were getting 7 to 8 hours of sleep a night and showed no apparent signs of sleep deprivation, ______ percent fell asleep immediately when they were put in a dark room, a symptom of chronic sleep loss

Affective reactions differ from emotions in a number of ways. For example, affective reactions tend to ____

a. occur more automatically b. involve a stronger behavioral component c. be more likely to relate to particular events d. be more complex

Electrical stimulation of the cells of the preoptic area of the hypothalamus results in immediate a. NREM sleep

b. wakefulness. c. REM sleep. d. coma.