Jeff's genome contains a recessive gene for cystic fibrosis. Jeff is said to be a ______ of the gene for cystic fibrosis

PTSD was first listed as a mental disorder in the DSM-III in_________.

Fill in the blank(s) with the appropriate word(s).

Although the exact mechanisms for alcohol's action in the brain are not completely understood, it is now believed that the most important of its many effects is

A. enhancing GABA's inhibitory effects. B. blocking serotonin receptors. C. releasing norepinephrine. D. stimulating glutamate receptors.