5_10_07a - Immunology/Embryology Thursday, May 10, 2007...

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Immunology/Embryology   Thursday, May 10, 2007 9:32 AM See fig 43.10  An overview of the immune response   Differentiate the different pathways   Antibody mediated immune response Antibody recognizes antigen at antibody receptors Linked to B-cell Cell-mediated immune response T-cell receptors   T-helper cells Smoke detectors of the immune system Must have the activation of the T-helper cells for a full blown amplified immune  response   T-helper cells need to have an antigen presenting cell which has MHC-II complexes. Macrophages, dendritic cells and other usually phagocytotic immune cells   All other somatic cells have MHC-I complex and those when presenting  antigens are only recognized by cytotoxic T-cells.   Production of memory cells results in active immunity.     Humoral or antibody mediated immune response See Fig 43.17   Macrophage phagocytizes the pathogen  Presents MHC-II molecule on surface
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5_10_07a - Immunology/Embryology Thursday, May 10, 2007...

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