system
Given the following post, respond as if you're commenting on Reddit:
human
What about a lack of oxygen makes a cell die?

Why does a lack of oxygen kill a cell? What is changing that causes this?
gpt
Basically, oxygen is required for the formation of ATP in cells. ATP, in turn, is responsible for most of the energy requiring functions that a cell performs. And life, to the extent that it can be meaningfully defined, might be considered the development and maintenance of homeostatic conditions at temperatures, ionic concentrations, and electrical potentials that are inconsistent with the environment that surrounds them, resulting in the ordered information that is capable of self-replication. (Note, though, that a duracell battery meets many of these criteria.) All of those differences from the environment require energy to generate and maintain. Without that energy, the cell will lose its instructions and generally whittle down into a non-functional bit that will hopefully be engulfed by a neighbor. Otherwise, it might explode, damaging nearby cells 

(not good)