Are t lymphocytes responsible for cell-mediated immunity?

Yes, T lymphocytes (T cells) are indeed responsible for cell-mediated immunity. They play a crucial role in recognizing and responding to infected or abnormal cells, primarily through the actions of cytotoxic T cells that directly kill infected cells. Additionally, helper T cells support the activation and function of other immune cells, enhancing the overall immune response. This adaptive immune response is vital for defending against intracellular pathogens and tumors.