The hormone __________ is produced in ________, which some scientists speculate may lead to differences in male and female brain structure, and later variations in gender-related behavior(s)

According to Allport, the ultimate real unit of personality is

A) a common trait that exists in a specified population. B) the neuron. C) a unique trait, which has psychophysical reality within an individual. D) unconscious motivation.

Which hormone functions as a neurotransmitter in the brain, tends to arouse the body, and is linked with anger?

a. melatonin b. epinephrine c. norepinephrine d. thyroxin