Duke is exhausted and plops down on the couch.Fifteen minutes after falling asleep,Duke is not awakened by the refrigerator cycling on.He is,however,awakened by his roommate opening the refrigerator door.Duke is most likely in ____.
A)Stage 1 N-REM
B)Stage 2 N-REM
C)Stage 3 or 4 N-REM
D)REM sleep

Question

Quizplus · Accepted Answer

Duke was not awakened by the refrigerator cycling on, which suggests that he was in a deeper sleep stage. However, he was awakened by the sound of the refrigerator door opening, which suggests that he was in a lighter sleep stage. Stage 2 N-REM is the best choice as it is a lighter sleep stage where external stimuli can still be processed, and people are easily awoken by noises.

Duke Is Exhausted and Plops Down on the Couch