Suppose you have been asleep for approximately 90 minutes.What sleep stage are you likely to begin to enter?
A)slow-wave sleep
B)theta-wave sleep
C)K-complex sleep
D)REM sleep

Question

Quizplus · Accepted Answer

After about 90 minutes of sleep, a person is likely to enter into REM (rapid eye movement) sleep. This is because sleep usually progresses in cycles that last about 90 minutes each, and REM sleep is usually the last stage of a sleep cycle.

Suppose You Have Been Asleep for Approximately 90 Minutes