KINE 2011 Study Guide - Phagocyte, Adaptive Immune System, Pathogenic Bacteria
Document Summary
Immunity: the body"s ability to resist/eliminate potentially harmful foreign materials or abnormal cells: state of protection from infectious disease. Virulence: disease producing power of a pathogen. Bacteria large, self-sustaining: non-nucleated, single-celled microorganisms, pathogenic bacteria: cause tissue damage and produce disease by releasing enzymes/toxins that physically injure/functionally disrupt affected cells and organs, ex: tb, tetanus, whooping cough. Can be spread over large distances via world travel. Fungi can be multicellular; often cause disease of the skin/epithelium: ex: thrush, ringworm. Parasites multicellular; have different forms/habitats at different stages of their life cycle: ex: malaria, leishmaniasis. Site of action = where the infectious agents are or in the secondary lymphoid tissue where they produce/secrete active factors to fight the infectious agents. Lymphoid tissues: the tissues that produce, store or process lymphocytes: strategically located to intercept invading microorganisms before they have a chance to spread very far. Bone marrow: origin of all blood cells, site of maturational processing for b lymphocytes.