feedback mechanism


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feed·back in·hi·bi·tion

(fēd'bak in'hi-bish'ŭn)
Inhibition of activity by an end product of the pathway of which that activity is a part.
Synonym(s): feedback mechanism.
Feedback mechanismclick for a larger image
Fig. 159 Feedback mechanism . Excess production of X causes a shutdown of the process by inhibition of the first step from A to B.

feedback mechanism

a mechanism by which the products of a process can act as regulators of that process. Many biochemical processes are controlled by negative feedback mechanisms. See Fig. 159 . Mammals utilize negative feedback mechanisms to maintain HOMEOSTASIS in several systems, for example blood thyroxine levels, body temperature, blood osmotic pressure. Occasionally positive feedback occurs, which is a disruptive process where products of a process cause further ACTIVATION; for example, excess core heat in mammals will in turn encourage a higher metabolic rate which produces yet more heat and eventually death.
References in periodicals archive ?
Based on the advantages of teaching system and considering all the implementation characteristics of the new teaching approach in cartography course, we designed the following feedback mechanism in the teaching cartography course in Fig.1:
The fuzzy feedback mechanism (Figure 3) consists of a fuzzifier, a knowledge base, a fuzzy inference engine and a defuzzifier.
Sophisticated manufacturing partners have realized that manufacturability feedback mechanisms can be automated by building review phases into their quality systems and by ensuring the shop floor can meet the increased speed to market requirements by deploying the right manufacturing technology in the most efficient layout possible.
There are three key features of this technology--rapid switching, a compact optical switching fabric, and an optic power-level feedback mechanism.
The new release can be used as a voting application or as a feedback mechanism for public sector, e-government and company web sites.
They get back to the physician, and it's a feedback mechanism the doctors really appreciate."
Through the computer's feedback mechanism, clients can actually see where their balance is off and can follow their personal progress as it is tracked on the computer screen," explains Roe.
* Provide a feedback mechanism. Good policy management encourages employee involvement.
In commodity markets, the consumer is anonymous and standards-based production is pushed on the market with price as the only feedback mechanism," he says.
Other features include a positioning feedback mechanism included with the cylinder, which links the controller to the piston rod.
When something goes wrong you can try to fix it, but you can't ever let outsiders know there was anything wrong."' This inability to tolerate--much less profit by--criticism pervades not just the officer class but the entire society and results in a kind of national learning disability; lacking an effective feedback mechanism, Turkey perennially fails to learn from its mistakes.