In developed countries, people typically have to confront the issue of their own parents' death during ________

Which of the following fits the usual definition of a substance abuse problem?

a) Physical withdrawal symptoms occur when use is stopped. b) Use is continued after several episodes in which it caused a problem(s). c) Tolerance is developed. d) There is craving to use every day.

When Pavlov placed food in the mouths of canine subjects, they began to salivate. The salivation was a(n)

a. unconditioned response. b. unconditioned stimulus. c. conditioned response. d. conditioned stimulus. e. discriminative stimulus.