As part of the human immune response, which cells are responsible for producing antibodies?

• A. Macrophages
• B. Lymphocytes
• C. Erythrocytes
• D. Neutrophils

Answer: (B)

Antibody production comes from B lymphocytes. These white blood cells carry receptors for specific antigens and, when they encounter their target and receive help from other immune cells, they multiply and differentiate into plasma cells. Plasma cells then secrete large amounts of antibodies into the blood. These antibodies bind to pathogens, neutralize them, and help other parts of the immune system recognize and destroy the invaders.

Macrophages and neutrophils are innate immune cells that primarily engulf and digest pathogens, not produce antibodies. Erythrocytes, or red blood cells, transport oxygen and do not participate in antibody synthesis.