Question

Which of the following cells are involved in the defensive mechanism?

• A. Neutrophils
• B. Lymphocytes
• C. Macrophages
• D. All of the above

Answer 1

The correct option is D All of the above

a) Neutrophils are phagocytic leukocytes that engulf pathogens which are destroyed by the granules in them.

b) Lymphocytes are white blood that are concentrated in central lymphoid organs and tissues. There are two types of lymphocytes, B lymphocytes and T lymphocytes. T lymphocytes play a role in cell-mediated immunity and B lymphocytes are involved in humoral immune response.

c) Macrophages are made from white blood cells called monocytes and engulf the dead cells. All the three play a role in immunity.

So, the correct answer is option D.