During a typical night of sleep, a normal adult sleeper cycles between non-REM sleep and REM sleep at approximately every ____ minutes

a. 30 to 60 c. 90 to 120
b. 60 to 90 d. 120 to 150

ANS: C
During a typical night of sleep, a normal adult sleeper cycles between non-REM sleep and REM sleep approximately every 90 to 120 minutes.

Health Professions

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A) bilirubin B) hemoglobin C) vitamin D D) calcium

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