What is the primary role of memory cells (B and T cells) in the adaptive immune response?

The correct answer to the question "What is the primary role of memory cells (B and T cells) in the adaptive immune response?" is Option C: To provide a faster and stronger secondary immune response upon re-exposure..

The other options — A) To directly engulf pathogens via phagocytosis., B) To produce antibodies during the initial infection., D) To present antigens to other immune cells. — are incorrect for this IB Exam Prep question. As explained above: Memory B and T cells persist after the initial infection, allowing for a much quicker, more potent, and long-lasting immune response if the same pathogen is encountered again, providing long-term imm…