CBSE Class 10 Answered

It is the return of a portion of the output of a process or system to the input, especially when used to maintain performance or to control a system or process. Feedback controls are a type of self-regulating mechanism by which certain activities are sustained within prescribed ranges. These mechanisms may be positive or negative.

It is a process in which the level of one substance influences the level of another substance.

An example of positive feedback loop is the onset of contractions in childbirth. When contraction begins, the hormone oxytocin is released into the body to stimulate further contractions. As for the negative feedback loop, an example is the regulation of blood glucose levels. If blood glucose levels continue to rise it may result in diabetes. In fact, there are many biologic processes that use negative feedback to maintain homeostasis or dynamic equilibrium