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  4. An allergic reaction is initiated by antibodies of the

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Q. An allergic reaction is initiated by antibodies of the

Chhattisgarh PMTChhattisgarh PMT 2010

Solution:

Immunoglobulin $E (IgE)$ normally has wry-very low concentrations in blood and connective tissues, but it plays a crucial role in allergic reactions. It binds to mast cells and when triggered by the presence of antigen causes histamine release and, hence inflammation and other common allergic reactions occur.