PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Capable of recognizing antigens on a foreign cell to mark it for destruction
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a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
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a state of hypersensitivity induced by exposure to an allergen
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the immunity which results from the production of antibodies by the immune system in response to the presence of an antigen.
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Detailed explanation-1: -Hypersensitivity reactions are exaggerated or inappropriate immunologic responses occurring in response to an antigen or allergen. Type I, II and III hypersensitivity reactions are known as immediate hypersensitivity reactions because they occur within 24 hours of exposure to the antigen or allergen.
Detailed explanation-2: -Examples include contact dermatitis, poison ivy, tuberculin skin test, and certain drug reactions, such as allopurinol. Treatment options for Type IV hypersensitivity may include medications like corticosteroids and avoiding exposure to the triggering antigen.
Detailed explanation-3: -Type I: reaction mediated by IgE antibodies. Type II: cytotoxic reaction mediated by IgG or IgM antibodies. Type III: reaction mediated by immune complexes. Type IV: delayed reaction mediated by cellular response. 06-Mar-2023