Which cells are considered professional phagocytes?

• A. Basophils and Neutrophils
• B. Neutrophils and Macrophages
• C. B cells and T cells
• D. Lymphocytes and Eosinophils

Answer: (B)

Professional phagocytes are specialized cells that actively engulf and digest cellular debris, pathogens, and foreign substances. Among the options provided, neutrophils and macrophages fit this definition.

Neutrophils are the most abundant type of white blood cells and are among the first responders to sites of infection or injury. They are highly efficient phagocytes, utilizing various mechanisms to identify, ingest, and destroy invading organisms. Their rapid response plays a critical role in the innate immune system.

Macrophages, derived from monocytes, are another type of professional phagocyte with a broader role in immune response. They not only engulf pathogens but also play significant roles in antigen presentation and the orchestration of the immune response. Macrophages can continue to function and adapt over a longer period compared to neutrophils, allowing them to participate in both the innate and adaptive immune responses.

In contrast, the other cell types listed do not primarily function as phagocytes. Basophils are involved in allergic responses and releasing histamines, while B cells and T cells are critical for the adaptive immune response, focusing on antibody production and targeted cell-mediated immunity, respectively. Lymphocytes generally play roles distinct from direct phagocytosis, and eosinophils