The part of our brain that MOST makes us human is the

Depression is

a. always accompanied by a manic state. b. equally common among men and women. c. a type of psychosis. d. the most common psychological disorder.

Smoking is more frequent among schizophrenics than in the non-schizophrenic population, probably because:

a. Schizophrenics lack self-control b. schizophrenics have a neural vulnerability to addiction c. Nicotine improves auditory gating d. All of the above