Histamine is released from the granules of which cells?

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Study for the NATA BOC Domain 2 Clinical Evaluation and Diagnosis Test. Utilize our comprehensive flashcards and multiple-choice quiz features; each question comes with hints and thorough explanations. Prepare effectively for your certification exam!

Multiple Choice

Histamine is released from the granules of which cells?

Explanation:
Histamine is a preformed mediator stored in secretory granules of tissue-resident immune cells, especially mast cells. When these cells are activated, they degranulate and release histamine, leading to effects like vasodilation and increased vascular permeability that drive redness, swelling, and sometimes bronchoconstriction in allergic and inflammatory responses. Among the options listed, mast cells best fit as the source of granule-stored histamine. Neutrophils and erythrocytes do not store or release histamine in granules, and platelets carry other mediators rather than this classic histamine store.

Histamine is a preformed mediator stored in secretory granules of tissue-resident immune cells, especially mast cells. When these cells are activated, they degranulate and release histamine, leading to effects like vasodilation and increased vascular permeability that drive redness, swelling, and sometimes bronchoconstriction in allergic and inflammatory responses. Among the options listed, mast cells best fit as the source of granule-stored histamine. Neutrophils and erythrocytes do not store or release histamine in granules, and platelets carry other mediators rather than this classic histamine store.

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