After Mark has gone through one full sleep cycle,his heart beats faster,his breathing becomes fast and irregular,and his closed eyes begin to move back and forth.Mark is most likely experiencing
A) REM behavior disorder.
B) REM sleep.
C) stage 1 sleep.
D) slow-wave sleep.

Question

Quizplus · Accepted Answer

Mark is most likely experiencing REM (Rapid Eye Movement) sleep, characterized by fast and irregular breathing, increased heart rate, and rapid movement of the eyes behind closed lids. This stage of sleep is associated with vivid dreams.

After Mark Has Gone Through One Full Sleep Cycle,his Heart