After Carlos had been asleep for about an hour and a half,his heart began to beat faster,his breathing became fast and irregular,and his closed eyes began to dart back and forth.Carlos was most likely experiencing
A) NREM-3 sleep.
B) sleep apnea.
C) narcolepsy.
D) REM sleep.

Question

Quizplus · Accepted Answer

Carlos is experiencing rapid eye movement (REM) sleep, which is characterized by fast and irregular breathing, increased heart rate, and rapid eye movements.

After Carlos Had Been Asleep for About an Hour and a Half,his