Tcells are activated by two signals: t cell receptor engagement with the antigen co-stimulatory signal that occurs due to receptor-ligand interaction. a. true b. false

The statement above is TRUE.
T cells are part of the white blood cells and function in the immune system response of the body. T cells function by destroying infected cells. T cells can be activated either by T cell receptor engagement with the antigen or by the signal that is produced by the receptor ligand interactions.