Question

question
which white blood cells (wbcs) make up 50 - 70% of the circulating white blood cells, and are very active phagocytes, that specialize in attacking and digesting bacteria?
answer
eosinophils
basophils
neutrophils
monocytes
lymphocytes

Explanation:

• Eosinophils: Make up 1 - 4% of WBCs, involved in allergic reactions and parasitic infections.
• Basophils: Least common (0.5 - 1%), release histamine in allergic responses.
• Neutrophils: Most abundant (50 - 70%), active phagocytes against bacteria.
• Monocytes: 2 - 8%, differentiate into macrophages for phagocytosis.
• Lymphocytes: 20 - 30%, key in immune response (T and B cells).

Answer:

Neutrophils