The brain structure that controls unconscious but essential functions such as breathing and circulation is the

Which of the following statements about "male menopause" is true?

Similar to women, men experience a sudden age-related drop in hormonal levels. Men suffer from sudden, stress-related shifts in hormone levels. Viagra prevents decline of sexual desire and speed of ejaculation as men age. Frequency of intercourse increases during middle adulthood.

A girl likes a boy and he finds out about her feelings. If this girl and boy are similar to most people, it can be predicted that the boy will develop the same feelings for the girl, based on the idea of

a. normative influence. b. reciprocity. c. similarity. d. physical attractiveness.