Questions and Answers
1.our awareness of ourselves and our environment.
ANS consciousness
2.the biological clock; regular bodily rhythms (for example, of
temperature and wakefulness) that occur on a 24-hour cycle.
ANS circadian rhythm
3.rapid eye movement sleep; a recurring sleep stage during which vivid
dreams commonly occur. Also known as paradoxical sleep, because the
muscles are relaxed (except for minor twitches) but other body systems
are active.
ANS REM sleep
4.the relatively slow brain waves of a relaxed, awake state.
ANS alpha waves
5.periodic, natural loss of consciousness—as distinct from
unconsciousness resulting from a coma, general anesthesia, or hibernation.
ANS sleep
6.false sensory experiences, such as seeing something in the absence of
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, an external visual stimulus.
ANS hallucinations
7.the large, slow brain waves associated with deep sleep.
ANS delta waves
8.non-rapid eye movement sleep; encompasses all sleep stages except
for REM sleep.
ANS NREM sleep
9.recurring problems in falling or staying asleep.
ANS insomnia
10.a sleep disorder characterized by uncontrollable sleep attacks. The
suffer- er may lapse directly into REM sleep, often at inopportune times.
ANS narcolepsy
11.a sleep disorder characterized by temporary cessations of breathing
dur- ing sleep and repeated momentary awakenings.
ANS sleep apnea
12.a sleep disorder characterized by high arousal and an appearance of
being terrified; unlike nightmares, night terrors occur during Stage 4 sleep,
within two or three hours of falling asleep, and are seldom remembered.
ANS night terrors
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