Plasma cells are formed when a B-lymphocyte successfully binds to an antigen (foreign molecule, often a surface protein of a pathogen) . The B-lymphocyte divides, producing memory cells, which stay in the bloodstream for a long time (in case the antigen returns), and plasma cells, which produce antibodies, one of the major components of the immune response. Plasma cells are vital to the immune system as the antibodies they produce perform a number of functions, including "marking" pathogens for other lymphocytes, and disrupting the functioning of pathogens.

Log in or register to write something here or to contact authors.