What type of cell is primarily responsible for antibody-mediated immunity?

What type of cell is primarily responsible for antibody-mediated immunity?

• A. T cells
• B. Macrophages
• C. B cells
• D. Natural killer cells

Answer: (C)

The cell type primarily responsible for antibody-mediated immunity is B cells. These cells play a crucial role in the adaptive immune response by producing antibodies, which are proteins that specifically recognize and bind to antigens (foreign substances) like pathogens. When B cells encounter an antigen, they can become activated and differentiate into plasma cells, which are responsible for producing large quantities of antibodies. These antibodies circulate throughout the body and bind to pathogens, marking them for destruction or neutralizing their harmful effects. This process enhances the ability of the immune system to eliminate infections and provides the basis for immunological memory, which allows for a quicker and more efficient response upon subsequent exposures to the same antigen. In contrast, other cell types such as T cells are primarily involved in cell-mediated immunity, macrophages play a significant role in phagocytosis and presenting antigens, and natural killer cells are involved in the destruction of virus-infected cells and tumor cells, rather than antibody production. Thus, it is B cells that are directly responsible for the production of antibodies in the immune system.

The cell type primarily responsible for antibody-mediated immunity is B cells. These cells play a crucial role in the adaptive immune response by producing antibodies, which are proteins that specifically recognize and bind to antigens (foreign substances) like pathogens. When B cells encounter an antigen, they can become activated and differentiate into plasma cells, which are responsible for producing large quantities of antibodies.

These antibodies circulate throughout the body and bind to pathogens, marking them for destruction or neutralizing their harmful effects. This process enhances the ability of the immune system to eliminate infections and provides the basis for immunological memory, which allows for a quicker and more efficient response upon subsequent exposures to the same antigen.

In contrast, other cell types such as T cells are primarily involved in cell-mediated immunity, macrophages play a significant role in phagocytosis and presenting antigens, and natural killer cells are involved in the destruction of virus-infected cells and tumor cells, rather than antibody production. Thus, it is B cells that are directly responsible for the production of antibodies in the immune system.