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Transcript
Objective 13 • Plasma cells produce antibodies against antigens. • Memory cells mount a rapid attack against the same antigen. • Antibody structure Objective 14 • Active immunity is acquired during an infection or from a vaccination. Obj.14 continued • Passive immunity is given when a donor’s antibodies are injected into the bloodstream or from mother. Obj. 15 5 Classes of Antibodies • IgA (immunoglobulin A) • IgG (these all differ by • IgM structure and function) • IgD • IgE Obj. 16 Function of Antibodies • Complement fixation • Antigen neutralization • Precipitation • Agglutination Objective 17: Clonal Selection of T cells • T cell growth is stimulated by the protein displayed on the surface of the macrophage. • Some become active killers others become memory T cells. Obj. 18: Roll of T Cells • Cytotoxic T cells attack and lyse infected cells. • Helper T cells release interleukin. • Suppressor T stop immune response Objective 19: Immune Diseases • Congenital thymic aplasia • Severe combined immunodeficiency • Acquired immunodeficiency Objective 19 continued • Hypersensitivities or allergies an abnormally intense response to an allergen. Objective 20: Tolerance • Sometimes tolerance develops. • The body does not react to an allergen.