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MCAT Bio

Ch. 10 Immune System

QuestionAnswer
organs of the immune system lymph nodes, bone marrow, thymus, spleen
nonspecific immunity innate immunity, the responses cells carry out without learning
specific immunity adaptive immunity is developed as immune cells learn to recognize and respond to particular antigens. divided into humoral immunity and cell-mediated immunity
humoral immunity mediated by B-cells. B-cells proliferate to make plasma cells and memory cells. antibodies are made my plasma cells. effective against bacterial infections
Cell-mediated immunity involves T-lymphocytes. three major classes are helper T-cells, suppressor T-cells, and killer (cytotoxic) T-cells. fights viral and fungal infection
antibodies fight infection by binding to foreign antigens, thereby allowing other immune cells (eg macrophages) to phagocytize them
Types of immunizations active immunization results in a sustained immune response mediated by B-cells. Passive immunization effects are short lived
natural immunization natural immunization is the result of exposure to the antigen in nature or transfer of antibodies from mother to fetus.
artificial immunization artificial active immunization uses weakened to dead forms of microbes to generate an immune response without causing active infection
lymphatic system secondary circulatory system that removes excess fluid from the interstitial space. also transports fat molecules from the intestinal epithelial cells to bloodstream and serves as a conduit for the movement of immune cells
Created by: adam87 on 2010-07-11



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