OBJECTIVE LIFE SCIENCE
SIGNALLING IMMUNOLOGY CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which type I hypersensitivity reaction is often initiated by an injected or gut-absorbed allergen such as bee sting venom, PCN, seafood, or nuts?
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systemic anaphylaxis
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localized reaction
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food allergy
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None of the above
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Explanation:
Detailed explanation-1: -Type II hypersensitivity reaction refers to an antibody-mediated immune reaction in which antibodies (IgG or IgM) are directed against cellular or extracellular matrix antigens, resulting in cellular destruction, functional loss, or damage to tissues.
Detailed explanation-2: -Type I reactions (i.e., immediate hypersensitivity reactions) involve immunoglobulin E (IgE)–mediated release of histamine and other mediators from mast cells and basophils. Examples include anaphylaxis and allergic rhinoconjunctivitis.
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