Final answer:
B cells stimulated by interleukin-2 differentiate into plasma cells that produce antibodies specific to pathogens, a process crucial to the body's adaptive immune response.
Step-by-step explanation:
B cells that have been stimulated by interleukin-2 develop into plasma cells. These cells are essential in the adaptive immune response. When activated by T helper cells (TH2), B cells undergo clonal selection, a process in which they proliferate rapidly and mature into plasma cells. Plasma cells then synthesize and secrete antibodies that are specific to pathogens, such as viruses or bacteria.
Clonal selection ensures that those B cells that have receptors for a particular antigen are selected for proliferation. The result is an increased antibody response specific to the invading pathogen. This mechanism is fundamental to the cell-mediated immune response and humoral immunity, demonstrating the sophisticated coordination of different immune cells to protect the body from infections.