What is the primary function of an effector cell?

What is the primary function of an effector cell?

• A. To regulate immune response
• B. To carry out the immune reaction
• C. To create antibodies
• D. To present antigens

Answer: (B)

Effector cells play a crucial role in the immune response by actively carrying out the actions necessary to eliminate pathogens or infected cells. Once activated by helper T cells, effector cells, which include various types of lymphocytes such as cytotoxic T cells and plasma cells, directly engage in the immune response.

Cytotoxic T cells, for instance, target and destroy virus-infected cells or cancer cells, while plasma cells, derived from activated B cells, produce antibodies that neutralize pathogens. Therefore, the primary function of effector cells is to perform the specific actions required to combat infections and immune challenges, making them essential to the immune reaction itself.

The other functions mentioned, such as regulating the immune response, creating antibodies, or presenting antigens, are carried out by different types of immune cells or through distinct processes and do not encompass the direct action role that effector cells fulfill.