Which cells are involved in both cellular and humoral reactions during an immune response?

• A. B lymphocytes
• B. T lymphocytes
• C. Helper T cells
• D. Macrophages

Answer: (C)

Verified step by step guidance

1. Understand the two main types of immune responses: cellular and humoral. Cellular immunity involves T cells, while humoral immunity involves B cells and the production of antibodies.
2. Identify the roles of different lymphocytes: B lymphocytes are primarily involved in humoral immunity, producing antibodies. T lymphocytes are involved in cellular immunity, with different types such as helper T cells and cytotoxic T cells.
3. Recognize the role of helper T cells: They are crucial in both cellular and humoral immune responses. They assist in activating B cells to secrete antibodies and also help activate cytotoxic T cells to kill infected target cells.
4. Consider the role of macrophages: These cells are part of the innate immune system and help in phagocytosis, but they also present antigens to T cells, linking innate and adaptive immunity.
5. Conclude that helper T cells are involved in both cellular and humoral reactions, as they play a central role in coordinating the immune response by interacting with both B cells and other T cells.