What is the first sleep stage that most people enter each night when sleeping?

How an individual reacts to stress in the work place would be of most interest to __________

a) social psychologists. b) educational psychologists. c) industrial/organizational psychologists. d) clinical psychologists.

Acetylcholine, norepinephrine, dopamine, and GABA are examples of

a. neurotransmitters. b. negative after-potentials. c. synaptic ions. d. neurilemmas.