Negative feedback facts for kids
Negative feedback is a basic concept of cybernetics; it is the basis of regulation and control. It is important in engineering and physiology. In biology and physiology negative feedback is known as homeostasis.
Negative feedback occurs when the output of a system acts to oppose changes to the input of a system. This has the result that the changes are made less, and the system kept within limits. The classic example is a central heating system which cuts off when a (suitably placed) temperature sensor hits a pre-set mark. The negative feedback part is the thermostat.
Homeostasis was defined by Claude Bernard and later by Walter Bradford Cannon in 1926, 1929 and 1932 is the property of a system, either open or closed, that regulates its internal environment and tends to maintain a stable, constant condition. The concept came from that of milieu interieur which was created by Claude Bernard and published in 1865.
Negative feedback Facts for Kids. Kiddle Encyclopedia.