What specific chemical is released by mast cells and basophils that increases the degree of local inflammation?

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Multiple Choice

What specific chemical is released by mast cells and basophils that increases the degree of local inflammation?

Histamine is the primary chemical released by mast cells and basophils that amplifies local inflammation. These cells store histamine in granules and release it rapidly (degranulation) in response to stimuli such as allergens or tissue injury. Once released, histamine acts mainly on endothelial cells to cause vasodilation and to make capillary walls more permeable. The result is increased blood flow to the area and leakage of fluid into tissues, producing redness, warmth, and edema characteristic of early inflammation. It also can irritate surrounding nerves, contributing to itch or pain. While other mediators like interleukin-1, bradykinin, and prostaglandins participate in inflammation, histamine is the classic mediator released by mast cells and basophils that immediately heightens the local inflammatory response.

Histamine is the primary chemical released by mast cells and basophils that amplifies local inflammation. These cells store histamine in granules and release it rapidly (degranulation) in response to stimuli such as allergens or tissue injury. Once released, histamine acts mainly on endothelial cells to cause vasodilation and to make capillary walls more permeable. The result is increased blood flow to the area and leakage of fluid into tissues, producing redness, warmth, and edema characteristic of early inflammation. It also can irritate surrounding nerves, contributing to itch or pain.

While other mediators like interleukin-1, bradykinin, and prostaglandins participate in inflammation, histamine is the classic mediator released by mast cells and basophils that immediately heightens the local inflammatory response.

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