Which of the following statements about REM sleep is true?
A) While dreaming, eyes may dart around as if watching a dream unfold.
B) Dreams occur only in REM sleep.
C) The diaphragm, nasal membranes, and erectile tissue cannot move during dreams because of loss of muscle tone.
D) Time spent in REM sleep decreases later in the sleep cycle.

Question

Quizplus · Accepted Answer

During REM sleep, the eyes may move rapidly back and forth (known as Rapid Eye Movements or REMs), as if watching a dream unfold. This is why REM sleep is also known as paradoxical sleep - the body is in a state of muscle paralysis, but the brain is highly active and the eyes are darting around.

Which of the Following Statements About REM Sleep Is True