What is the difference between positive feedback control system negative feedback control system?
In terms of physiology an example of a negative feedback mechanism would be the stretch receptors in muscle which send signals back to nerves causing the movement to stop the signals. A positive feedback mechanism example would be the beginning of the action potential. The initial influx of sodium ions depolarize the cell which cause even more sodium channels to open. To generalize positive feedback mechanisms are less common and never unlimited.
