Final answer:
The Fas ligand on activated cytotoxic T cells interacts with the Fas receptor on target cells, which belongs to the death receptor family.
Step-by-step explanation:
The molecule Fas ligand on activated cytotoxic T cells interacts with the Fas receptor on target cells. Fas is associated with the apoptotic signaling pathway and belongs to the death receptor family. When Fas ligand binds to Fas, it triggers a signaling cascade that leads to the death of the target cell through apoptosis.