What is the primary role of plasma cells?

Plasma cells play a crucial role in the immune response by producing antibodies. These specialized cells are derived from B lymphocytes after they encounter an antigen. When a B cell binds to an antigen, it undergoes activation and differentiation into a plasma cell, which can then secrete large volumes of antibodies specific to that antigen. These antibodies circulate in the bloodstream and help neutralize pathogens, mark them for destruction, or prevent their spread.

This function is vital for the adaptive immune response, allowing the body to specifically target and eliminate foreign invaders, such as bacteria and viruses. The production of antibodies by plasma cells not only contributes to immediate immune protection but also plays a role in the formation of immunological memory, which helps the body respond more rapidly and effectively to future infections by the same pathogen.