The outermost part of the brain that is made up of tightly packed neurons and is only a tenth of an inch thick is called the __________

An unconditioned stimulus is any stimulus that

a. triggers a learned response. b. is based upon its association with another unconditioned stimulus. c. provides positive or negative reinforcement. d. naturally elicits a behavior without learning. e. inhibits previously learned behavior.

Which of the following is most common in the elderly?

a) Abuse of illegal drugs b) Abuse of legal medications c) Alcohol abuse d) Paraphrenia