The process of maintaining internal stability is a central concept of human physiology and is called? user: the prediction of the outcome of a disease is called?

The concept of internal human stability which is also a central concept of human physiology which you're talking about/asking a question about would be homeostasis. By a homeostatis we're talking about a very narrow interval of functioning in which people function best and have optimal working efficiency. 

Wikipedia aswell can be used to solve the following questions