Which cell type is chiefly responsible for production and secretion of antibodies?

Which cell type is chiefly responsible for production and secretion of antibodies?

• A. B lymphocytes
• B. T lymphocytes
• C. Neutrophils
• D. Monocytes

Answer: (A)

Antibody production is a function of the humoral immune response. B lymphocytes, when activated by their specific antigen and help from other immune signals, differentiate into plasma cells that synthesize and secrete large amounts of antibodies. These antibodies circulate in the blood and extracellular fluids to neutralize pathogens or tag them for destruction by other immune cells. T lymphocytes play roles in cellular immunity and regulation but do not produce antibodies. Neutrophils and monocytes are phagocytes involved in innate defenses and inflammation, not antibody secretion. So the cell type chiefly responsible for production and secretion of antibodies is the B lymphocyte.

Antibody production is a function of the humoral immune response. B lymphocytes, when activated by their specific antigen and help from other immune signals, differentiate into plasma cells that synthesize and secrete large amounts of antibodies. These antibodies circulate in the blood and extracellular fluids to neutralize pathogens or tag them for destruction by other immune cells.

T lymphocytes play roles in cellular immunity and regulation but do not produce antibodies. Neutrophils and monocytes are phagocytes involved in innate defenses and inflammation, not antibody secretion. So the cell type chiefly responsible for production and secretion of antibodies is the B lymphocyte.