tests of cerebral lateralization. 1  sodium amytal test: anesthetize one hemisphere and check for language function. 2  dichotic listening test: report more digits heard by dominant half. 3  functional brain imaging: fMRI or PET used to see which half is active when performing a language test.
one of a large group of low-molecular-weight proteins secreted by various cell types and involved in cell-to-cell communication, coordinating antibody and T cell immune interactions, and amplifying immune reactivity. Cytokines include colony-stimulating factors, interferons, interleukins, and lymphokines, which are secreted by lymphocytes.
When a helper T cell encounters a B cell that has itself encountered an antigen, the helper T cell releases cytokines that activate the B cell so that it can divide and form a clone. 3. Some of the B cells become plasma cells, producing and secreting antibodies. G. Types of Antibodies (p.