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18 Cards in this Set
- Front
- Back
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acquired immunity
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immunity that develops from exposure to an antigen
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key properties of
acquired immunity |
specificity and memory
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antigenic determinant /
epitope |
specific molecular groups to which an antibody reacts
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antigen / immunogen
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any substance that reacts with products of an immune response /
immunogen stimulates the response |
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antigen-presenting cell
APC |
A cell that presents peptide fragments associated with MHC class II proteins
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protein receptor
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membrane bound proteins on the surface of cells that recognize specific antigenic determinants
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MHC
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major histocompatability complex
cell surface proteins for self-recognition and immune responses |
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humoral response
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protective response mediated by antibody molecules that circulate with the body fluids
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cell-mediated response
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protective response mediated by specialized cells
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immunity
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all of the mechanisms used by the body as protection against microorganisms and othe foreign agents
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nonspecific external
defense mechanisms |
First line of defense
includes physical barriers, chemical agents and bacterial interference |
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nonspecific internal
defense mechanisms (5) |
Second line of defense
phagocytosis lymphatic system inflammation white blood cells and other blood components |
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Protective physical barriers (7)
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Skin
Mucous membranes eyes (lysozyme) outer ear canal alimentary canal genitourinary tract respiratory tract |
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White blood cells
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Granulocytes (neutrophils / basophils)
Monocytes (macrophages) Lymphocytes (B cells / T cells) |
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Neutrophils
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WBC 1% of body weight
1st of acute inflammatory response phagocytize bacteria |
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Macrophages
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wandering and fixed
- phagocytic - present antigen to lymphocytes |
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B cells
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lymphocytes found in lymph nodes and spleen
preprogrammed to respond to a specific antigen |
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T cells
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lymphocytes found in thymus
respond to specific antigens that have been presented to them |
