One of the most powerful weapons that groups have to insure their members' cooperation and to weed out disruptive members is rejection or permanent banishment

Benzodiazepines are believed to be effective in treating generalized anxiety disorder because they mimic the effect of ______ at certain receptor sites in the brain.

A) GABA B) dopamine C) acetylcholine D) serotonin

High levels of estrogens in females inhibit the production of

A) GnRH. B) testosterone. C) progesterone. D) HGH.