Which WBC type is most associated with phagocytosis and has a respiratory burst?

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Multiple Choice

Which WBC type is most associated with phagocytosis and has a respiratory burst?

Neutrophils are the primary white blood cells responsible for rapid phagocytosis of invading microbes. After a pathogen is engulfed, they trigger a respiratory burst, a swift production of reactive oxygen species (like superoxide and hydrogen peroxide) through the NADPH oxidase system to kill the ingested microbes inside the phagosome. Their granules add antimicrobial enzymes (such as myeloperoxidase) that boost killing. This combination—strong phagocytic activity plus a robust oxidative burst—is the hallmark that makes neutrophils the best match. Lymphocytes are mainly for adaptive immunity, eosinophils target parasites and allergies with less phagocytic emphasis, and monocytes/macrophages also phagocytose but are not as tightly linked to the rapid respiratory burst that neutrophils exhibit in acute responses.

Neutrophils are the primary white blood cells responsible for rapid phagocytosis of invading microbes. After a pathogen is engulfed, they trigger a respiratory burst, a swift production of reactive oxygen species (like superoxide and hydrogen peroxide) through the NADPH oxidase system to kill the ingested microbes inside the phagosome. Their granules add antimicrobial enzymes (such as myeloperoxidase) that boost killing. This combination—strong phagocytic activity plus a robust oxidative burst—is the hallmark that makes neutrophils the best match. Lymphocytes are mainly for adaptive immunity, eosinophils target parasites and allergies with less phagocytic emphasis, and monocytes/macrophages also phagocytose but are not as tightly linked to the rapid respiratory burst that neutrophils exhibit in acute responses.

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