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Immune System - AP Biology Flashcards

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6325138564Inflammatory ResponseVasodilation, phagocytosis, and increase in body temperature0
6325138565Histamineschemical signals that trigger vasodilation, increasing blood supply to area and cause inflammation.1
6325138566PhagocytesWhite blood cells that engulf invading pathogens e.g., neutrophils, macrophages2
6325138567Cytokinechemical signals secreted by blood vessel cells that attract more white blood cells (phagocytes) to the area3
6325138568Specific immunityB and T cells; humoral and cell-mediated response4
6325138569LymphocyteWhite blood cell in which B and T cells belong5
6325138570B CellsHumoral response by producing antibodies; activated by T cells or free antigens6
6325138571T CellsCell-mediated response, stimulating by APCs (antigen presenting cells)7
6325138572Helper 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
6325138573Cytotoxic T CellKills body cells that have been infected with pathogens; stimulated by antigens and helper T-cells9
6325138574MacrophagesAPC that engulfs large numbers of pathogens; presents antigen to activate T cells10
6325138575Interleukin 1Chemokine/cytokine secreted by a macrophage after it engulfs and presents antigens on its surface; activates helper T cells11
6325138576Interleukin 2Chemokine that stimulates B cells to become active antibody-secreting plasma cells; released by helper T cell12
6325138577MHC Imolecules found on every body cell that presents antigen; signals cytotoxic T to destroy13
6325138578MHC IImolecules found on macrophages, B cells, and activated T cells; signal helper T cells14
6325138579Memory CellsResponsible for lifelong immunity by storing copy B and T cells to more quickly fight secondary infection15
6325138580AntibodyY-shaped protein with variable antigen bind region; slows pathogens to facilitate destruction16
6325138581AntigenIdentifying marker on the outside of a pathogen17
6325138582Passive ImmunityTemporary immunity where antibodies are transferred from another animal ex: mother transfers some of her antibodies to her nursing child18
6325138583HIVA retrovirus that attacks helper T cells19
6325138584Autoimmune diseaseA mistake in the immune system where the body does not properly distinguish self from nonself20
6325138585AllergyHypersensitive immune response to certain substances that causes that release of histamine21
6325138586Dendritic CellsDuring primary immune responses, the principle antigen-presenting cells in the lymph nodes22
6325138587Innate ImmunityGeneral, non-specific protection to the body, including the skin (barrier), gastric acid, phagocytes, and lysozyme.23
6325138588Effector CellShort-lived lymphocyte such as a B cell or cytotoxic T lymphocyte that can take immediate action against an antigen.24
6325138589Natural Killer CellsA type of white blood cell that can kill tumor cells and virus-infected cells; an important component of innate immunity.25
6325138590Mast CellsCells that release chemicals (such as histamine) that promote inflammation.26
6325138591Humoral 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
6325138592Cell-mediated ResponseThe branch of acquired immunity that involves the activation of cytotoxic T cells, which defend against infected cells.28
6325138593NeutrophilsThe 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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