Humoral and Cell

Humoral and Cell - Humoral and Cell-Mediated Immune...

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Humoral and Cell-Mediated Immune Responses The immune system distinguishes two groups of foreign substances. One group consists of antigens  that are freely circulating in the body. These include molecules, viruses, and foreign cells. A second  group consists of self cells that display aberrant MHC proteins. Aberrant MHC proteins can originate  from antigens that have been engulfed and broken down (exogenous antigens) or from virus-infected  and tumor cells that are actively synthesizing foreign proteins (endogenous antigens). Depending on  the kind of foreign invasion, two different immune responses occur:  The humoral response (or antibody-mediated response) involves B cells that recognize  antigens or pathogens that are circulating in the lymph or blood (“humor” is a medieval term  for body fluid). The response follows this chain of events: 1. Antigens bind to B cells. 2.
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Humoral and Cell - Humoral and Cell-Mediated Immune...

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