Eosinophils are phagocytic cells that inactivate mast cell products and destroy parasites. What is their typical concentration range?

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Multiple Choice

Eosinophils are phagocytic cells that inactivate mast cell products and destroy parasites. What is their typical concentration range?

Eosinophils are a minor but important white blood cell type whose job includes fighting parasites and modulating allergic responses by inactivating mast cell mediators. In a healthy individual, their absolute count ranges from about 0.0 to 0.5 x 10^9/L (0–500 cells/μL). This low, baseline level reflects their role as a smaller fraction of circulating leukocytes. The description of eosinophils as phagocytic cells that inactivate mast cell products and destroy parasites aligns with their function, and the normal concentration range given matches commonly observed values. In contrast, the other options refer to different cell types—red blood cells that carry oxygen or platelets involved in clotting—which have distinct, much higher or unrelated reference ranges.

Eosinophils are a minor but important white blood cell type whose job includes fighting parasites and modulating allergic responses by inactivating mast cell mediators. In a healthy individual, their absolute count ranges from about 0.0 to 0.5 x 10^9/L (0–500 cells/μL). This low, baseline level reflects their role as a smaller fraction of circulating leukocytes. The description of eosinophils as phagocytic cells that inactivate mast cell products and destroy parasites aligns with their function, and the normal concentration range given matches commonly observed values. In contrast, the other options refer to different cell types—red blood cells that carry oxygen or platelets involved in clotting—which have distinct, much higher or unrelated reference ranges.

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