What role do B and T cells play in the immune response?

B and T cells are integral components of the adaptive immune system, and their correct role can significantly affect how the body responds to pathogens. T cells primarily function in cell-mediated immunity, which involves directly attacking infected cells. On the other hand, B cells are crucial for humoral immunity due to their ability to produce antibodies.

The correct answer, which states that B and T cells are involved in humoral immunity, captures the comprehensive role of these cells in the immune response. While it is more characteristic of B cells to produce antibodies directly, T cells also play a supportive role in humoral immunity by aiding B cells in recognizing antigens and generating a robust antibody response. Hence, this choice emphasizes the partnership in immune functions that both types of cells have, although each type has distinct pathways and specificities in immune defense.

Understanding this relationship is essential. Humoral immunity specifically refers to the aspects of the immune response that involve the production of antibodies by B cells, which are activated when they encounter specific antigens and with the help of T cells. This aspect is vital in protecting against infections and is a key focus in immunology, making it clear why the involvement of B and T cells in this immune mechanism is a correct and valid answer.