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Immune System - AP Biology Flashcards

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6324317550Inflammatory ResponseVasodilation, phagocytosis, and increase in body temperature0
6324317551Histamineschemical signals that trigger vasodilation, increasing blood supply to area and cause inflammation.1
6324317552PhagocytesWhite blood cells that engulf invading pathogens e.g., neutrophils, macrophages2
6324317553Chemokineschemical signals secreted by blood vessel cells that attract more white blood cells (phagocytes) to the area3
6324317554Specific immunityB and T cells; humoral and cell-mediated response4
6324317555LymphocyteWhite blood cell5
6324317556B CellsHumoral response by producing antibodies; activated by T cells or free antigens6
6324317557T CellsCell-mediated response, stimulating by APCs (antigen presenting cells)7
6324317558Helper T CellSet off an alarm to the immune system that pathogens have broken through the body's line of defense; binds to class II MHC8
6324317559Cytotoxic T CellKills body cells that have been infected with pathogens; stimulated by antigens and helper T-cells9
6324317560MacrophagesAPC that engulfs large numbers of pathogens; presents antigen to activate T cells10
6324317561Interleukin 1Chemokine secreted by a macrophage after it engulfs and presents antigens on its surface; activates helper T cells11
6324317562Interleukin 2Chemokine that stimulates B cells to become active antibody-secreting plasma cells; released by helper T cell12
6324317563MHC Imolecules found on every body cell that presents antigen; signals cytotoxic T to destroy13
6324317564MHC IImolecules found on macrophages, B cells, and activated T cells; signal helper T cells14
6324317565Memory CellsResponsible for lifelong immunity by storing copy B and T cells to more quickly fight secondary infection15
6324317566AntibodyY-shaped protein with variable antigen bind region; slows pathogens to facilitate destruction16
6324317567AntigenIdentifying marker on the outside of a pathogen17
6324317568Passive ImmunityTemporary immunity where antibodies are transferred from another animal ex: mother transfers some of her antibodies to her nursing child18
6324317569HIVA retrovirus that attacks helper T cells19
6324317570Autoimmune diseaseA mistake in the immune system where the body does not properly distinguish self from nonself20
6324317571AllergyHypersensitive immune response to certain substances that causes that release of histamine21
6324317572Dendritic CellsDuring primary immune responses, the principle antigen-presenting cells in the lymph nodes22
6324317573Innate ImmunityGeneral, non-specific protection to the body, including the skin (barrier), gastric acid, phagocytes, and lysozyme.23
6324317574Effector CellShort-lived lymphocyte such as a B cell or cytotoxic T lymphocyte that can take immediate action against an antigen.24
6324317575Natural Killer CellsA type of white blood cell that can kill tumor cells and virus-infected cells; an important component of innate immunity.25
6324317576Mast CellsCells that release chemicals (such as histamine) that promote inflammation.26
6324317577Humoral ResponseThe branch of acquired immunity that involves the activation of B cells and that leads to the production of antibodies, which defend against bacteria and viruses in body fluids.27
6324317578Cell-mediated ResponseThe branch of acquired immunity that involves the activation of cytotoxic T cells, which defend against infected cells.28
6324317579NeutrophilsThe most abundant type of white blood cell. Phagocytic and tend to self-destruct as they destroy foreign invaders, limiting their lifespan to a few days. (aka: Pus)29

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