Which of the Following Statements About Sleep Is Correct

Multiple Choice

Which of the following statements about sleep is correct?

A) Sleep typically occurs in stages in which a subject goes through progressively deeper stages of sleep and then awakens.
B) Sleep typically occurs in cycles in which a subject will cycle through various stages of slow-wave sleep punctuated by paradoxical sleep several times during one bout of sleep.
C) During REM sleep,blood pressure and breathing rate become elevated.
D) Sleep involves a lack of neurological activity.
E) All muscles are relaxed during all phases of sleep.