The average amount of time it takes to complete each cycle through the stages of NREM sleep and REM sleep lasts about:
A)30 minutes.
B)1 hour.
C)90 minutes.
D)2 hours.

Question

Quizplus · Accepted Answer

The average cycle through the stages of NREM sleep and REM sleep lasts about 90 minutes. This cycle repeats throughout the night, with each cycle typically containing more NREM sleep in the earlier stages and more REM sleep in the later stages.

The Average Amount of Time It Takes to Complete Each