Regarding difficulties in treatment for heroin abuse, short-term effects of heroin are to withdrawal as long-term effects are to

Betty believes she is less capable than her coworkers, even though she has won many awards for her performance. She often feels lonely and believes no one wants to be her friend. Her future seems empty and meaningless. These traits characterize

a. cyclothymia. b. psychotic depression. c. the "depressive triad." d. somatic deficits in depression.

A one-celled organism formed by the union of the sperm and egg is known as

a. zygote. b. germinal. c. embryo. d. fetus.