Which statement describes a general characteristic of hypersensitivity reactions?

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Multiple Choice

Which statement describes a general characteristic of hypersensitivity reactions?

Explanation:
Hypersensitivity is defined by an exaggerated immune response to an antigen, leading to tissue injury and symptoms rather than effective protection. This overreaction can be antibody-mediated in some types or driven by T cells in others, so antibodies aren’t required in every reaction. Additionally, the triggering antigen isn’t necessarily harmful—the immune system can react to harmless environmental substances or to self-antigens in autoimmune cases. So the hallmark is an exaggerated, inappropriate immune response to an antigen.

Hypersensitivity is defined by an exaggerated immune response to an antigen, leading to tissue injury and symptoms rather than effective protection. This overreaction can be antibody-mediated in some types or driven by T cells in others, so antibodies aren’t required in every reaction. Additionally, the triggering antigen isn’t necessarily harmful—the immune system can react to harmless environmental substances or to self-antigens in autoimmune cases. So the hallmark is an exaggerated, inappropriate immune response to an antigen.

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