Immunity
Immunity ( 54 Questions)
B cells are a type of lymphocyte that produces antibodies against specific antigens. When a B cell encounters an antigen that matches its specific receptor, it becomes activated and differentiates into plasma cells, which are responsible for producing large quantities of antibodies that can target and neutralize the antigen.
T cells are involved in cell-mediated immunity and do not produce antibodies. They recognize and directly attack infected or abnormal cells in the body.
Macrophages are antigen-presenting cells that engulf and process pathogens to present their antigens to other immune cells. They do not produce antibodies themselves but play a role in initiating the immune response.
Natural killer cells are a type of lymphocyte involved in the innate immune response. They do not produce antibodies but can directly kill infected or abnormal cells.
Explanation: B cells are a type of lymphocyte that produces antibodies against specific antigens. When a B cell encounters an antigen that matches its specific receptor, it becomes activated and differentiates into plasma cells, which are responsible for producing large quantities of antibodies that can target and neutralize the antigen.
Incorrect choices:
b. T cells are involved in cell-mediated immunity and do not produce antibodies. They recognize and directly attack infected or abnormal cells in the body.
c. Macrophages are antigen-presenting cells that engulf and process pathogens to present their antigens to other immune cells. They do not produce antibodies themselves but play a role in initiating the immune response.
d. Natural killer cells are a type of lymphocyte involved in the innate immune response. They do not produce antibodies but can directly kill infected or abnormal cells.