During the first Gulf War, many individuals were hospitalized just for the trauma of not knowing whether the warheads contained chemical weapons or not. This is one example of one of the main dimensions of stress, called:

A dog is conditioned to salivate to the sound of a bell. Then the bell is presented alone until the dog no longer salivates to it. A few days later, the dog again salivates to the bell. The underlined sentence represents

a) extinction. b) acquisition. c) generalization. d) spontaneous recovery.

The human genotype contains about ______ genes

a. 20,000 to 25,000 c. 60,000 to 65,000 b. 40,000 to 45,000 d. 80,000 to 85,000