Regarding sleep cycles, which of the following statements is FALSE?
A) In terms of brain activity, REM sleep is similar to ordinary wakefulness.
B) As the night progresses, the amount of time spent in REM sleep decreases.
C) The difference between Stage 3 and Stage 4 sleep is based on the proportion of delta waves present.
D) During sleep, brain waves vary in terms of intensity as well as speed.
E) During the night, Stage 4 sleep eventually disappears.
Correct Answer:
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