Primary immune response the inidal immune system

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Unformatted text preview: d immune response. AnDgen- any molecule that elicits a response from a lymphocyte. AnDbody- a protein that is secreted by a B cell and aMaches to a specific kind of anDgen, helping counter its effects. Monoclonal anDbodies- an anDbody secreted by a clone of cells and consequently specific for one anDgen that triggered the development of the clone. Clonal selecDon- the producDon of a lineage of geneDcally idenDcal cells that recognize and aMack the specific anDgen that sDmulated their proliferaDon. Clonal selecDon is the mechanism that underlies the immune system’s specificity and memory of anDgens. Effector cells- a short- lived lymphocyte that has an immediate effect against a specific pathogen. Primary immune response- the iniDal immune system response to an anDgen, which includes producDon of effector cells that respond to the anDgen within a few days and also memory cells that will respond to future exposure to the anDgen. Memory cells- a long- lived lymphocyte that responds to subsequent exposures to a specific pathogen. A memory cell is formed during the primary immune response and is acDvated by exposure to the same anDgen that triggered its formaDon. When acDvated, a memory cell forms large clones of effector cells, and memory cells that mount the secondary immune response. Secondary immune response- the immune response elicited by memory cells upon exposure to a previously encountered anDgen. The secondary immune response is more rapid, of greater magnitude, and of longer duraDon than the primary immune response. VaccinaDon- a procedure that presents the immune system with a harmless variant or derivaDve of a pathogen, thereby sDmulaDng an adapDve defense when the pathogen itself is encountered. Vaccine- a harmess variant or derivaDve of a pathogen (a disease- causing virus or organism) used to sDmulate a host organism’s immune system to mount a long- term defense against the pathogen. Humoral immune response- the type of adapDve immune response that involves secreDon of anDbodies into the blood and lymph by effector B cells. These anDbodies fight bacteria and viruses in body fluids. Cell- mediated immune response- the type of adapDve immune response that involves T cells, lymphocytes that fight body cells infected with pathogens. Cytotoxic t T cells- a...
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