REM sleep is sometimes referred to as paradoxical sleep because:
a. the more sleep deprived a person is, the less REM sleep she experiences.
b. REM sleep is not really a sleep stage.
c. electrical activity in the brain completely shuts down during REM sleep.
d. EEG activity in the brain during REM is similar to EEG activity during an awake state.
Answer: D
Rationale: EEG waves appear to represent a state of wakefulness, despite the fact that we remain asleep.
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