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| An antimicrobial protein that digests the cell walls of bacteria |
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| The most abundant kind of White blood Cell. They engulf infected tissue and destroy microbes. |
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| A macromolecule that elicits an immune response by lymphocytes |
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| A White blood cell with low phagocytic activity that releases toxic enzymes to paracytic worms. |
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| a phagocytic cell present in many tissues that functions in innate immunity by destroying microbes and in acquired immunity as an antegen-presenting cell |
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| cells that patrol the body and attack virus-infected body cells and cancer cells. An important component of innate immunity |
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| a group of about 30 blood protiens that may amplify inflamatory response, enhance phagocytosis or lyse pathogens. ac tivated by antigens on microorganism, or by antigen-antibody complement |
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| a substance release by mast cells that causes blood cells to dialate and become more permeable during an inflamatory response. |
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| A type of white blood cells that migrates into tissues and developes a macrophage. |
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| a protein that has antiviral or immune regulatory functions. Interferon-α and interferon-β, secreted by T cells, helps activate macrophages. |
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| Long-Lasting immunity conferred by the action of a person's B cells and T cells and the resulting B and T memory cells specific for a pathogen. Active immunity can develop as a result of natural infection or immunization |
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| Short=term immunity conferred by the administration of ready-made antibodies or the transfer of maternal antibodies to a fetus or nursing infant; lasts only a few weeks or months because the immune system has not been stimulated by antigens. |
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| The 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. |
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| a muscle cell or gland cell that performs the bodys responses to stimuli; responds to signals from the brain or other processing center of the nervous system. |
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