For instance, some evidence suggests that stem
cells run out of steam as they get older.
Not exact matches
But some
of the
cells eventually
run out of steam, and can't muster another replacement cycle.
Alternatively, flagging mitochondria might simply cause
cells to
run out of steam.
For fruit flies, the fountain
of youth may be filled with an energy - sensing protein usually activated when
cells are
running out of steam.