OBJECTIVE LIFE SCIENCE
SIGNALLING IMMUNOLOGY CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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hypersensitivity reaction
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when the body is exposed to a foreign substance and the immune system overreacts and harms the body
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inflammation of the lymph nodes
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enlargement of the spleen
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None of the above
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Explanation:
Detailed explanation-1: -Allergies occur when your immune system reacts to a foreign substance-such as pollen, bee venom or pet dander-or a food that doesn’t cause a reaction in most people. Your immune system produces substances known as antibodies.
Detailed explanation-2: -There are four types of hypersensitivity reactions: type I is immunoglobulin E, or IgE mediated; type II is mediated by antibodies that activate cellular cytotoxicity, type III is mediated by immune-complexes, and type IV is a delayed T cell mediated hypersensitivity reaction.
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