The development of schizophrenia may involve stress altering the levels of which neurotransmitter which in turn alters the dopamine systems?

In North America, the average age of onset of puberty is about ____ years old for girls and _____ years old for boys

a. 9; 14 b. 11; 13 c. 10; 12 d. 12; 15

Which of the following best represents the research on gay and lesbian couples?

a. Gay and lesbian adults often seek out romantic partners who are opposite from them in many ways. b. No differences have been identified between gay and lesbian couples. c. Gay and lesbian couples have different sources of conflict in their relationship than do heterosexual couples. d. Gay and lesbian couples are similar to heterosexual couples in most ways.