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Details Title: Anatomy-Test2 Description: Immune System Total Flash Cards: 18 Created: 02/28/2004 10:10:30	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term What is the immune system? Definition Two divisions: non-specific & specific Term Non-specific? Definition defends agaisnt all pathogens -skin & mucous membranes: keratin, natural acidity of secretions, enzymes, mucus -cells: neutrophils & eosinophils destroy pathogens in blood & tissue monocytes-phagocytosis lymphocytes-NK cells kill viruses, bacteria, cancer cells, ect. -fever: pyrogens secreted by WBC or pathogens can reset temperature setpt dangerous if temp is high enough to denature proteins otherwise beneficial(inc metabolism, reduced availability of minerals) -inflammation: triggered when damaged cells release chemical signals vasodilation(redness, heat) capilalary permeablitity(swelling) pressure on nerve endings(pain) Term what is the goal of inflammation? Definition prevent spread of pathogens & clear area for repair, dilute toxins, bring O2 & nutrients for repair, inc WBC #s pus: collection of dead cells, pathogens Term special defenses? Definition mechanisms that defend agaisnt specific pathogens(antigens) Term what an antigen? Definition anything that provokes an immune response, "nonself" (bacteria, pollen, fungi) Term What's MHC? Definition Major histocompatibility complex: cell surface proteins that signify "self" & can present antigen to lymphocytes Term what is the primary cell type of specific defense? Definition lymphocytes-made in bone marrow, must become immunocompetent(able to recognize just one antigen) Term What are the two type of lymphocytes here and what do they do? Definition B Cells(b lymphocytes) mature in the bone marrow, produce antibodies T Cells(T lymphocytes) mature in the thymus, detect antigens inside cells(viruses) Term What's the T Cells(cell-mediated immunity)- Definition detection of antigens inside cells antigen or fragment of antigen is displayed on cell's surface by MHC protein T cell has surface receptor that recognizes a specific antigen activated T cells divide into several different types Term What are the different types the T cell divides into? Definition Helper T cells, Cytotoxic T cells, Suppressor T cells, & memory T cells Term what's the helper T cell? Definition "boss" of the immune response(loss is critical, ex. AIDS) directs T & B cells to proliferate & inc antibody production secrete chemicals to attract other WBCs Term What's the cytoxic T cell do? Definition "attack dogs" of the immune response, kills infected cells by secreting toxins Term what's the suppressor T cells? Definition "leash" of the immune system, secrete chemicals that inhibit T & B cells to end immune response Term What's memory T cells? Definition "guard dogs", detect future exposure to antigen Term What's B cells(humoral immunity)? Definition detection of antigens in blood & tissues Term what's their antibody? Definition Y-shaped protein secreted by B cells, w/ region that recognizes a specific antigen & coats it which neutralizes pathogen or attracts phagocytes-either method ends in phagocytes Term what's the different classes w/ various roles & locations in the body? Definition IgG, IgD, IgE, IgA, IgM Term what's trigers B cells to divide rapidly? Definition the antigen -plasma cells(manufacture & secrete antibodies) -memory cells(starts immune response again if antigen encountered in the future)