A ________________ is a physical state that stands for an object, event, or concept

Siegel and his colleagues have shown in animal studies that tolerance to opioids

A. is due to reduced absorption of the drug. B. is not very great. C. occurs after only a single exposure. D. is partly due to conditioned responses.

Newly discovered research on adolescents and emerging adults suggests growth in the __________ contributes to development of higher-order functions such as understanding of humor, social skills, and decision making

a) cerebellum b) hippocampus c) occipital lobe d) amygdala