During an allergic reaction,the binding of an | vedclass

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(C) During an allergic reaction,antigens bind to $IgE$ antibodies,which triggers the release of chemicals from mast cells. Histamine is the primary ch

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Histamines

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(C) During an allergic reaction,antigens bind to $IgE$ antibodies,which triggers the release of chemicals from mast cells. Histamine is the primary chemical released during this process. It is derived from the amino acid histidine. Histamine causes the dilation of small blood vessels and increases their permeability. This physiological response leads to symptoms such as localized swelling,itching,sneezing,and watery eyes or nose.

During an allergic reaction,the binding of antigens to $IgE$ antibodies initiates a response,in which chemicals cause the dilation of blood vessels and a host of other physiological changes. Such chemicals are

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