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Positive feeback of homeostatic regulation

State an example of positive feeback of the homeostatic regulation?

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In positive feedback, the effect caused by an action stimulates the action even more. This is a rarer method of the homeostatic regulation. An example of positive feedback is blood clotting process where each chemical reaction generates enzymes which catalyzes the following reaction until formation of the fibrin is completed. Thus, products of the antecedent chemical reactions get consumed and equilibrium of each reaction gets dislocated towards the generation of more enzymes, a positive feedback.

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