Which type of immune cell is primarily involved in the humoral immune response?

Which type of immune cell is primarily involved in the humoral immune response?

• A. Monocytes
• B. B cells
• C. T cells
• D. Erythrocytes

Answer: (B)

Humoral immunity is the antibody-mediated defense of body fluids, and it is driven by B lymphocytes. When a B cell encounters its specific antigen, often with aid from helper T cells, it becomes activated and differentiates into plasma cells that secrete antibodies. These antibodies bind to pathogens or toxins in the bloodstream and extracellular spaces, neutralizing them, marking them for attack by other immune components, and helping to recruit other parts of the immune system. Memory B cells formed during this response provide faster protection if the same antigen is encountered again. Monocytes are innate phagocytes, T cells handle cell-mediated responses, and erythrocytes (red blood cells) do not participate directly in antigen-specific immunity, so they are not primarily involved in the humoral response.

Humoral immunity is the antibody-mediated defense of body fluids, and it is driven by B lymphocytes. When a B cell encounters its specific antigen, often with aid from helper T cells, it becomes activated and differentiates into plasma cells that secrete antibodies. These antibodies bind to pathogens or toxins in the bloodstream and extracellular spaces, neutralizing them, marking them for attack by other immune components, and helping to recruit other parts of the immune system. Memory B cells formed during this response provide faster protection if the same antigen is encountered again. Monocytes are innate phagocytes, T cells handle cell-mediated responses, and erythrocytes (red blood cells) do not participate directly in antigen-specific immunity, so they are not primarily involved in the humoral response.