What is the major class of antianxiety drugs such as Valium?

Eating because you are bored, depressed, or socializing demonstrates the role of _________ in regulating the hunger drive

a. learned behavior c. external incentives b. psychological factors d. all of these

Which of the following is categorized as an instinct?

a. A bird migrating in the winter b. A baby sucking on a nipple c. A knee jerking when tapped d. A pupil contracting in bright light