REM sleep has been called "paradoxical sleep" because:
A) the brain is very active, yet the body is entirely inactive.
B) the body is very active and restless, but the brain is very inactive.
C) the eyes are open, though the person remains asleep.
D) colorful dreams occur, in contrast to the black-and-white dreams of NREM sleep.
Answer: A
Rationale: REM is sometimes known as paradoxical sleep because the EEG waves appear to represent a state of wakefulness, but it is in fact a stage of sleep, during which body movements are inhibited.
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