I remember my high school bio teacher telling us that our body maintains homeostasis through a feedback loop like a house furnace maintains temperature. The furnace kicks on whenever it is needed to heat the house back up to the desired temperature and then shuts off again when that temperature is reached. But wouldn’t it be more efficient to just stay on at a low level always maintaining that temperature? Sort of how a car would maintain its speed. Cruise control works by maintaining the desired speed. Not speeding back up to that speed once it slows to a different speed. Right?