The brain's predictive regulation of the body, known as allostasis, involves budgeting resources like glucose, salt, oxygen, and water.

“the brain's regulation of the body the predictive regulation of the body is the technical term is allostasis but when I'm explaining this to the public I use a metaphor and you know all metaphors are wrong but some metaphors are less wrong and useful so the metaphor that I use is um your brain is running a budget for your body and it's not budgetting money it's budgeting glucose and salt and oxygen and water and all the nutrients that you need to stay alive and well”