The outer surface of the cortex consists of gray matter

The Social Readjustment Rating Scale (SRRS) measures stress related to

a. positive and negative life events. b. only negative life events. c. only positive life events. d. internal stressors. e. hassles.

Comparisons of hormone production in boys and girls show that:

a. before puberty, boys have higher levels of estrogen than do girls. b. from puberty on, boys and girls produce the same amounts of androgens and estrogens. c. before puberty, girls have higher levels of estrogen than do boys. d. from puberty on, boys produce more androgens and girls produce more estrogens.