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Definition Page for DrumLib's Health Research Review:
Feedback mechanism
A mechanism that regulates the action of something else. There
are both negative and positive feedback mechanisms. Here is an example of each: Positive
feedback mechanism: Low levels of thyroid hormone act as a signal to the pituitary gland to increase the output of
thyroid-stimulating hormone (TSH). Negative feedback
mechanism: High levels of thyroid hormone act as a signal to the pituitary gland to
decrease the output of thyroid-stimulating hormone (TSH).