When a stranger began walking behind Timothy on the dark and deserted street, his heart rate increased and the muscles in his legs began moving faster so he could gain some distance from the stranger. These mobilization and motor activities were most directly orchestrated by his ____ nervous system.?

Which of the following is NOT one of the symptoms listed by the DSM-IV-RT for a diagnosis of depression?

a. significant weight loss or gain c. increased interest in pleasure b. sleep disturbance d. disturbances in motor activity

What do all of the Cluster A disorders have in common?

A) social dysfunction B) clear link to schizophrenia C) distrust of others D) lack of emotional expression