Bacteriology Exam III
Terms
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- Neutrophil
- Phagocytosis of bacteria and viruses (blood)
- Basophil
- Release of histamine, seratonin (blood)
- Eosinophil
- Control inflammatory reponse (blood)
- Macrophage
- Phagocytosis, antigen-presentation (tissues)
- T-helper cells
- Stimulate immune system (lymph, blood)
- Cytotoxic T-cells
- Kill virus infected cells (lymph, blood)
- Antibody
- Molecules made by immune system to recognize antigens
- Antigen
- Molecule presented on a host that stimulates immune response
- Epitope
- Region of antigen that binds to antibody
- Opsonization
- Bacteria bind to antibodies to prepare for phagocytosis or complement fixation
- Leukocytes
- White blood cells
- Phagocytosis
- Engulfing of foreign particle
- Phagosome
- Compartment of cell that contains engulfed bacteria
- Complement
- Group of proteins that bind to opsonized bacteria and kill the bacteria.
- Memory cells
- T-cells, Tc cells, and B cells remember the bacteria on second exposure
- Plasma B cells
- Produce antibodies
- Lymphoid stem cells
- Differentiate into pro-T, pro-B, plasma cells, and memory cells
- Myeloid Stem Cells
- The 'phils', neutrophil, basophil, and eosinophils, and monocytes that stimulate the immune system
- IgG
- Precipitation of ags, antitoxins, complement fixation, placental transfer, opsonization
- IgA
- Secreted by B cells in mucous membranes, secretory antibodies
- IgM
- Five subunits, first Ab made against Ag, agglutination, opsonization
- IgD
- function uncertain
- IgE
- produced when reacting to allergies, binds to basophiles to release histamine
- Primary Roles of Antibodies (four)
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1. Opsonization of Bacteria
2. Virus Neutralization
3. Toxin neutralization
4. Complement fixaiton