The class of antibody mainly responsible for allergic reactions is
Correct answer: D. IgE
- A. IgG
- B. IgM
- C. IgA
- D. IgE
Explanation
IgE attaches to mast cells, and when allergen cross links it, histamine is released, producing sneezing, itching and swelling. The other classes defend against microbes rather than driving allergy.
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About Specific Defense Mechanism
Specific defense mechanisms provide targeted immunity through B lymphocytes, T lymphocytes, antibodies and memory cells that recognize particular antigens. Questions cover humoral and cell mediated responses, clonal selection, primary and secondary immune responses, vaccination and passive immunity, while distinguishing adaptive defenses from the immediate, non specific innate response.
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