ANSC 101 Lecture Notes - Lecture 7: Chemotaxis, Antigen, Neutrophil
3 Dec 2016
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Document Summary
System that allows for the identification of a foreign particle and the subsequent destruction or metabolism of that particle. Is not absolute, immunity exists in varying degrees. Leukocyte: white blood cell; cell of the immune system. Form 1: innate: non-specific, neutrophils and macrophages, macrophages. Form 2: adaptive: specific, vaccine development, lymphocytes. Innate (non-specific) genetically determined, present at birth: neutrophils and macrophages, ex: skin, secretions that coat the respiratory tract, etc. T and b lymphocytes: occurs after encountering foreign substances (antigens, made up of antibodies/antigens. Humoral (b cell lymphocytes, antibodies: antibodies produced in response to antigens antigen specific response. Cell-mediated (t cell lymphocyte: effective against viruses or bacteria that replicate within cells after crossing cell membranes, circulating antibodies are too large to cross cell barriers. Passive: newborns depend on antibodies in the colostrum until their own immune system is functional. Active: individual develops its own specific antibodies against invasive antigens. Increases, decreases, does not alter, none of the above.
