ENS 332 Lecture Notes - Lecture 21: T Helper Cell, Antigen-Presenting Cell, Mhc Class Ii
7 Dec 2016
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Antigen molecules that bind to antibodies: example: bacterial and viral surface proteins. B and t cells become activated, divide/mature into memory and effector cells. Memory cells hang around for years or decades. Effector cells actually do something; lasts for hours or days (at most) Effector b cells called plasma cells, fight in fluids (blood, extracellular fluid, etc. ) Effector t cells either helper t or cytotoxic t cells (different forms: fight within the tissues, work in cells that are already infected. Humoral immune response in fluids, mostly in antibodies from plasma cells. December 5, 2016: plasma cells and natural killer cells. Cell-mediated immunity defense against pathogens that have infiltrated cells, pathogens that survive within phagocytes, most viruses: tissues are already infected, mostly t cells for lymphocytes, dendritic and macrophages act like an amplifier to the t cells. Immune response coordinated reaction of cells of the immune system: innate or non-specific immunity.
