AEMCA Practice Exam

What role do plasma cells play in the lymphatic system?

1. Pathogen recognition

2. Antibody production

3. Fluid regulation

4. Toxin filtration

The correct answer is: Antibody production

Plasma cells play a crucial role in the lymphatic system by producing antibodies, which are vital components of the immune response. These specialized cells develop from activated B lymphocytes when they encounter specific antigens, leading to a robust immune response. Once differentiated, plasma cells generate large quantities of antibodies that are released into the bloodstream and lymphatic fluid. These antibodies are specifically tailored to bind to and neutralize pathogens such as bacteria and viruses, thereby helping to eliminate infections and provide immunity. While other options address important functions within the lymphatic system, they do not pertain directly to the specialized role of plasma cells in immunity. For instance, pathogen recognition primarily involves other immune cells that identify and respond to threats, while fluid regulation relates to the maintenance of fluid balance in the body, and toxin filtration typically involves the function of lymph nodes and specific immune cells rather than plasma cells specifically. Thus, the key function of plasma cells in the context of the lymphatic system is clearly centered on antibody production, making it the correct choice.