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.
Antigens are further able to interact with the lymphocytes. they activated and the antibodies they produced. 3. Often, antigens are proteins on viral, bacterial, and cell surfaces. a. Specific portions of antigen molecules, called antigenic. determinants, or epitopes, trigger immune responses.