When a person's sleep cycle is broken, which of the following occurs?
a. A new sleep cycle starts with non-rapid eye movement (NREM) sleep.
b. A new sleep cycle starts with rapid eye movement (REM) sleep.
c. The new sleep cycle involves more vivid dreaming.
d. The new sleep cycle is more restorative than the one that was interrupted.
A
The need for REM sleep increases during the overall sleep period, and dreams during these phases of later sleep can become intense. A break in the sleep cycle at any point results in the start of a new sleep cycle, beginning with stage 1 of NREM sleep.
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