Periods of R sleep alternate with periods of N sleep in a cycle that recurs about every ________ minutes or so.
A) 30
B) 90
C) 150
D) 210

Name: Periods of R sleep alternate with periods of N sleep in a cycle that recurs about every ________ minutes or so. A) 30 B) 90 C) 150 D) 210
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Question

Quizplus · Accepted Answer

The cycle in which periods of R sleep alternate with periods of N sleep is called REM-NREM cycle. This cycle recurs about every 90 minutes or so. Therefore, the best choice is B.

Periods of R Sleep Alternate with Periods of N Sleep