SPECIFIC HOST DEFENSE

SPECIFIC HOST DEFENSE - antibody and a higher titer of...

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SPECIFIC HOST DEFENSE: When we refer to a specific host defense we are talking about immunity. Some cellular phagocytosis of pathogens is "non-specific" but some is the result of specific immunity. Terms: Antigen: A substance which stimulates the immune system. It generally must be large and is usually protein. However, sometimes small molecules (penicillin) can combine with larger body molecules and become antigenic, and stimulate the immune system. Antibody: A protein molecule produced by a class of lymphocyte call B lymphocyte, which is soluble and can combine with the antigen that stimulate it and produce a variety of responses to deactivate the antigen. Immunity is aquired through contact with antigens, which allows for a rapid production of
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Unformatted text preview: antibody and a higher titer of antibody in the blood than before contact. The way this occurs is modeled in the "CLONAL SELECTION THEORY". CLASSIFICATION OF AQUIRED IMMUNITY Naturally Aquired Artificially Aquired Active Passive Active Passive Antigen enters body naturally and the body produces antibody and specialized lymphocytes Antibodies pass from mother to fetus through the placenta or to infant through breast feeding her milk. Antibodies are produced in response to vaccines body produces them and special lymphocytes Preformed antibodies are given in immune serum produced by another host (convalescent serum or horse serum). Introduced into the body through injection...
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