At 3 o'clock in the morning,John has already slept for four hours.As long as his sleep continues,we can expect an increasing occurrence of

Question

Quizplus · Accepted Answer

At 3 o'clock in the morning, John has already slept for four hours, which means he has likely completed his NREM-3 stage of sleep. As the night progresses, the amount of REM sleep increases, meaning that choice C, REM sleep, is the best answer. Hypnagogic sensations and muscle tension may occur during NREM-1 or NREM-2 sleep, but are less likely to increase as the night progresses. NREM-3 sleep occurs earlier in the night and is less likely to be present at 3 o'clock in the morning.

At 3 O'clock in the Morning,John Has Already Slept for Four