Adults spend about one-quarter of their sleep in ________. They spend about half their sleep time in _________.
A)REM sleep; stage N1
B)REM sleep; stage N2
C)stage N1; REM sleep
D)stage N2; stage N1

Question

Quizplus · Accepted Answer

Adults spend about one-quarter of their sleep in REM sleep and about half their sleep time in stage N2. Stage N2 is a part of non-REM sleep that is deeper than stage N1 and occupies the majority of the sleep cycle.

Adults Spend About One-Quarter of Their Sleep in ________