Body Fluids and Circulation Question 17
17. The most active phagocytic white blood cells are:
(a) neutrophils and eosinophils
(b) lymphocytes and macrophages
(c) eosinophils and lymphocytes
(d) neutrophils and monocytes
Show Answer
Answer : d
Hints & Solutions
(d) The most active phagocytic white blood cells are neutrophils and monocytes which modulate the innate immune response and phagocytose infections agents. Neutrophil has a lobed nucleus and granular cytoplasm. Neutrophils engulf bacteria and release various substance such as lysozyme and oxidising agents. Monocyte is the largest form of WBC in vertebrates. It has a kidney shaped nucleus and is actively phagocytic, ingesting bacteria and cell’s debris.
