LaTanya and her friend Marcus are talking. You observe that LaTanya is leaning in toward Marcus as she speaks to him. According to body positioning, this leaning indicates

In conditions of extreme stress, the hippocampus ______ and the amygdala ______

a. may dysfunction; may dysfunction b. may dysfunction; becomes overactive c. becomes overactive; may dysfunction d. becomes overactive; becomes overactive

Many of the mind-altering drugs affect the brain by

a. absorbing neural impulses. b. imitating, duplicating, or blocking neurotransmitters. c. changing the sodium balance in the synapse. d. duplicating the effect of potassium in the nuclei.