Final answer:
IL-2, 4, and 5 are interleukins that are secreted by T cells and are crucial for the proliferation and maturation of B cells into plasma cells, which produce specific antibodies. The statement that these interleukins lead to plasma cell secretion is true.
Step-by-step explanation:
IL-2, 4, and 5 are interleukins that play a critical role in the immune response. Specifically, these cytokines are secreted by T cells and are vital for the proliferation and maturation of B cells into plasma cells. Plasma cells are essentially antibody factories; once a B cell is activated upon recognition of its specific antigen, it proliferates and its progeny differentiate into plasma cells, which then produce antibodies specific to that antigen. These antibodies are a crucial component of the adaptive immune response, helping to neutralize and clear pathogens.
The statement that IL-2, 4, and 5 lead to plasma cells secreting is True. It highlights the importance of cytokine signalling in the humoral arm of the immune response, where B cells transition into plasma cells that secrete immunoglobulins, such as IgE, under the influence of these particular cytokines.