Which cell type is most closely associated with releasing histamine during allergic reactions?

Which cell type is most closely associated with releasing histamine during allergic reactions?

• A. Neutrophils
• B. Eosinophils
• C. Basophils
• D. Monocytes

Answer: (C)

Histamine release during allergic reactions comes from immune cells that store histamine in their granules and unleash it when activated. In the bloodstream, basophils are the circulating cells that carry histamine and respond quickly in the early phase of an allergic response. When an allergen cross-links IgE on a basophil, it triggers degranulation and release of histamine into surrounding tissues, leading to the familiar redness, swelling, and itching. This role mirrors what mast cells do in tissues, but basophils are the key circulating source of histamine in this context. Neutrophils are mainly first responders to bacterial infection and don’t specialize in histamine release. Eosinophils contribute to parasite defense and participate in later stages of allergic responses, releasing other mediators rather than histamine as their primary action. Monocytes become macrophages and focus on phagocytosis and antigen presentation, not histamine release. So, basophils are the cell type most closely associated with releasing histamine during allergic reactions.

Histamine release during allergic reactions comes from immune cells that store histamine in their granules and unleash it when activated. In the bloodstream, basophils are the circulating cells that carry histamine and respond quickly in the early phase of an allergic response. When an allergen cross-links IgE on a basophil, it triggers degranulation and release of histamine into surrounding tissues, leading to the familiar redness, swelling, and itching. This role mirrors what mast cells do in tissues, but basophils are the key circulating source of histamine in this context.

Neutrophils are mainly first responders to bacterial infection and don’t specialize in histamine release. Eosinophils contribute to parasite defense and participate in later stages of allergic responses, releasing other mediators rather than histamine as their primary action. Monocytes become macrophages and focus on phagocytosis and antigen presentation, not histamine release.

So, basophils are the cell type most closely associated with releasing histamine during allergic reactions.