Which cells are responsible for the rapid synthesis of antibodies during a secondary immune response?

The rapid synthesis of antibodies during a secondary immune response is primarily due to the action of memory B cells. When exposed to an antigen for the first time, B cells undergo a process of activation and differentiation, leading to the formation of memory B cells. These memory B cells are long-lived and remain in the body after the initial immune response has concluded.

Upon subsequent exposure to the same antigen, memory B cells can quickly recognize and respond to the pathogen. They rapidly proliferate and differentiate into plasma B cells, which are the cells that actually produce and secrete antibodies. This swift response is what characterizes the secondary immune response, leading to a more effective and faster antibody production compared to the primary response.

In summary, memory B cells are crucial for the quick mobilization and production of antibodies during subsequent infections by the same pathogen, leading to a more efficient immune response.