Questions: T cells that secrete cytokines that help antibody responses are called Th1 regulatory T cells thymocytes Th2

The answer is the last one: Th2.

Explanation for each option:

• Th1: These T cells are primarily involved in cell-mediated immunity and help activate macrophages and cytotoxic T cells. They are not primarily associated with helping antibody responses.

• Regulatory T cells: These cells are involved in maintaining immune tolerance and preventing autoimmune responses. They do not specifically help antibody responses.

• Thymocytes: These are immature T cells found in the thymus. They are not involved in secreting cytokines to help antibody responses.

• Th2: These T cells secrete cytokines that help B cells produce antibodies, particularly in response to extracellular pathogens. They are directly involved in aiding antibody responses.

In summary, Th2 cells are the ones that secrete cytokines to help antibody responses.