BIO SCI 45 Lecture Notes - Lecture 3: Immunoglobulin M, Complement System, Cytotoxicity

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We must understand how hiv causes disease to know how to prevent infection and slow progression of disease. Hiv impairs the ability of the immune system to defend against pathogens. The immune system evolved by successful protection of the host from pathogens -> the. Viruses influenza, chickenpox, hiv, hepatitis. (take over a eukaryotic cell) Bacteria pneumonia (get inside the cell and replicate inside the cell, then destroy it) Capillary beds off all body tissues where exchange of gases, nutrients, waste products. Dendritic cells (they can notify or tell other members of the immune system about what it consumed) B cells produce antibodies; each b lymphocyte makes only one type of antibody, with a single specificity for an antigen. T cells cd4 = helper cells (gets info from leukocytes to know whether cd8 will kill or not), cd8 = killer cells. All these cells are constantly replenished by stem cells from the bone marrow.

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