REM (R)sleep is sometimes called paradoxical sleep because
A) our heart rate is slow and steady,while our breathing is highly irregular.
B) we are deeply asleep but can be awakened easily.
C) our nervous system is highly active,while our voluntary muscles hardly move.
D) it leads to highly imaginative dreams that are perceived as colorless images.

Question

Quizplus · Accepted Answer

During REM sleep, our nervous system is highly active, while our voluntary muscles hardly move. This creates a paradoxical situation where our brain is active and dreaming, but our body is essentially "paralyzed".

REM (R)sleep Is Sometimes Called Paradoxical Sleep Because