Roughly _______ percent of a typical night's sleep is devoted to REM sleep, the stage at which dreams or nightmares are experienced.
A) 10
B) 20
C) 30
D) 40
E) 50

Question

Quizplus · Accepted Answer

On average, about 20-25% of a typical night's sleep is devoted to REM sleep, the stage at which dreams or nightmares are experienced. The other stages of sleep include NREM (non-REM) sleep, which is further divided into stages 1, 2, and 3.

Roughly _______ Percent of a Typical Night's Sleep Is Devoted