Author Question: Jeanine is sleeping when her mother calls her name. She wakes up quickly and is relatively alert. It ... (Read 28 times)

karen · **on:** Jun 22, 2018

Jeanine is sleeping when her mother calls her name. She wakes up quickly and is relatively alert. It is likely that Jeanine was in the _________ stage of sleep.

a. 1st
b. 2nd
c. 3rd
d. REM

Question 2

A hamster, when put in endless darkness, will display activity that fits a 23-hour day. This rhythm that the hamster is displaying is a(n):

a. endogenous rhythm.
b. entrained rhythm.
c. internal rhythm.
d. external rhythm.