Negative feedback occurs when some function of the output of a system, process or mechanism is fed back into the input with a polarity which tends to reduce the effect of changes in the input.{dubious|Definition of negative feedback|date=September 2014} Whereas positive feedback generally causes exponential growth, exponential decay, or oscillatio... Found on http://en.wikipedia.org/wiki/Negative_feedback
(from the article `automation`) ...ball to be moved outward. This motion controlled a valve that reduced the steam being fed to the engine, thus slowing the engine. The flying-ball ... ...account. Judicious use of feedback from later parts of a circuit to earlier ones can be utilized to stabilize such circuits or to perform various ... ... Found on http://www.britannica.com/eb/a-z/n/22
(from the article `hormone`) ...the presence of ACTH; CAMP in turn promotes synthesis of enzymes necessary for the formation of cortisol and corticosterone. The relationship ... Some endocrine glands are controlled by a simple negative feedback mechanism. For example, negative feedback signaling mechanisms in the parathyroid ... The ... Found on http://www.britannica.com/eb/a-z/n/22
This occurs where the products of a process can act at an earlier stage in the process to inhibit their own formation. The term was first used widely in conjunction with electrical amplifiers where negative feedback was applied to limit distortion of the signal by the amplification mechanism. Tends to stabilise the process. In contrast to positive ... Found on http://www.encyclo.co.uk/local/20973
This occurs where the products of a process can act at an earlier stage in the process to inhibit their own formation. The term was first used widely in conjunction with electrical amplifiers where negative feedback was applied to limit distortion of the signal by the amplification mechanism. Tends to stabilize the process. In contrast to positive feedback.
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A mechanism in the body for maintaining a state of internal constancy, or homeostasis; effectors are activated by changes in the internal environment, and the actions of the effectors serve to counteract these changes and maintain a state of balance. Found on http://www.mhhe.com/biosci/abio/glossary.mhtml
Feedback from the output of an analogue circuit that tends to oppose the input. This has the effect of stabilizing the circuit. See also: Feedback. Found on https://www.encyclo.co.uk/local/20687
A process that is triggered by an initial change in an environmental variable so that the original 'normal' condition is restored. See positive feedback. Found on https://www.encyclo.co.uk/local/23001