A cytotoxic T cell kills cells that have been infected by a virus or bacterium. It does this by puncturing the cell's membrane and by emitting a toxin that kills cells.
Cytotoxic T (or CD8) cells are activated in your lymph nodes by dendritic cells. Once activated they are sent out to the site of infection and they bind to the cells that express the MHC class I that...
Cytotoxic T cells destroy cancer cells. The cytoxic T cell comes into contrack with a cancer cell. The T cell recognizes that the cancer cell is "nonself" and causes the destruction of the cancer....