I was thinking along the same lines, but bigger. Mitochondria don't "shut down" when we sleep. If they did, we would die very quickly. If anything, they produc

I was thinking along the same lines, but bigger. Mitochondria don't "shut down" when we sleep. If they did, we would die very quickly. If anything, they produce quite a bit of energy during things like REM sleep and digestion. I'm sure I'm missing some subtle details about HOW they "rest", but from a 30000 ft view, it's puzzling.