Which of the following granulocytes is primarily responsible for phagocytizing and digesting invading microorganisms?

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

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the types of granulocytes listed: Basophils, Eosinophils, and Neutrophils. Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm.
2. Step 2: Recall the primary functions of each granulocyte: Basophils are mainly involved in allergic responses and release histamine; Eosinophils primarily combat parasitic infections and modulate allergic reactions; Neutrophils are the first responders to bacterial infection and are highly effective at phagocytosis.
3. Step 3: Define phagocytosis: it is the process by which certain cells engulf and digest microorganisms and cellular debris, an essential mechanism in innate immunity.
4. Step 4: Identify which granulocyte is specialized for phagocytosis and digestion of invading microorganisms. Neutrophils have a high capacity for phagocytosis and contain enzymes in their granules that help digest pathogens.
5. Step 5: Conclude that among the options, neutrophils are primarily responsible for phagocytizing and digesting invading microorganisms, making them key players in the body's defense against bacterial infections.