Final answer:
Plasma cells, which are activated B cells, have antibody type receptors that can activate a change that produces plasma cells. These cells function as antibody factories, producing antibodies that travel through the body to bind to antigens and initiate immune responses.
Step-by-step explanation:
Plasma cells, which are activated B cells, have antibody type receptors that can activate a change that produces plasma cells. Plasma cells are like antibody factories, producing many copies of a single type of antibody. These antibodies travel throughout the body in blood and lymph, binding to antigens and forming antigen-antibody complexes. The complexes flag the antigen-bearing cells for destruction by phagocytosis.