Modern attempts to classify psychological disorders date back to ____________

What structure is described in your text as the "gray matter" that forms the top portion of the brain?

A) cerebellum B) cerebral cortex C) brain stem D) frontal lobe

The key role of immunoglobulins in immune function is to

a. stimulate cell division. b. act as the body's first defense against malignant tumors. c. induce production of cells in the thymus. d. bind to antigens on the membrane of a foreign cell. e. induce the release of CRF from the PVN.