Question

multiple choice question
what do helper t cells do?

limit the immune response

directly attack foreign cell

promote the action of cytotoxic t cells

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Explanation:

• "Limit the immune response" is done by regulatory T cells, not helper T cells.
• "Directly attack foreign cell" is the role of cytotoxic T cells or natural killer cells, not helper T cells.
• Helper T cells secrete cytokines that activate and promote the action of cytotoxic T cells, B cells, and other immune cells. So the correct option is the one about promoting cytotoxic T cells' action.

Answer:

C. Promote the action of cytotoxic T cells