Letizia is participating in a study on sleep. As she sleeps, the researchers are likely to notice that in the first part of her night's sleep, _____ sleep is prominent, whereas in the second part, _____ sleep dominates.
A)REM; NREM
B)NREM; REM
C)N2; N1
D)N3; N2

Question

Quizplus · Accepted Answer

In the first part of the night, Non-Rapid Eye Movement (NREM) sleep, particularly the deeper stages like N3, is more prominent. In the second part of the night, Rapid Eye Movement (REM) sleep becomes more dominant.

Letizia Is Participating in a Study on Sleep