Author Question: The mean preferred time of going to sleep gets later and later until about age 20 and then starts a ... (Read 42 times)

rachel9 · **on:** Jun 22, 2018

The mean preferred time of going to sleep gets later and later until about age 20 and then starts a gradual reversal.

a. True
b. False
Indicate whether the statement is true or false

Question 2

A(n) ____ explanation of the brain invokes the chemical reactions that enable hormones to influence brain activity.

a. ontogenetic
b. evolutionary
c. physiological
d. functional