Yes, it does. However, allowing someone to die, does not include withholding food and water from the patient. Starvation and dehydration are deliberate acts which cause the death of the person. I love the way the Culture of Death is trying to brainwash the general public into an acceptance of the above-mentioned deliberate murder as a passive act.
Not with a feeding tube though.
On the other hand, with sufficient therapy, Terri might very well learn to feed herself, and that's another matter altogether. I have seen it done with what were considered hopeless parapalegics, and I understand it has not been tried for Terri.