Functions of Cells and Molecules Involved in Immunity

B cell
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Terms in this set (11)
Any of several cell types (macrophage, dendritic cell, B cell) that engulfs and digest antigens that it encounters and presents arts of them on its plasma membrane for recognition by T cells bearing receptors for the same antigen; this function, antigen presentation, is essential for normal cell-mediated responses. Also releases chemicals (cytokines) that activate T cells
Chemicals released by sensitized T cells, macrophages, and certain other cells:
Migration inhibiting factor-"inhibits" macrophage migration and keeps them in the local area
Interleukin 2-stimulates T cells and B cells to proliferate; activates NK cells
Helper factors-enhance antibody formation by plasma cells
Suppressor factors-suppress antibody of T cell-mediated immune responses (interleukin-10 transforming growth factor, and others)
Chemotactic factors-attract leukocytes (neutrophils,eosinophils, and basophils) into inflamed area
Gamma interferon-secreted by lymphocytes; helps make tissue cells resistant to viral infection; activates macrophages and NK cells; enhances maturation of cytotoxic T cells
AntigenSubstance capable of provoking an immune response; typically a large complex molecule not normally present in the body