An illustrative control system detects that a regulated temperature has risen and activates a response that lowers it. What makes this negative feedback?
Answer & explanation
The response opposes the original deviation.
Negative describes the direction of the loop: the response counteracts the detected change. It does not mean harmful or unsuccessful. Timing and response strength still affect whether the system stabilizes.
Guyton and Hall Textbook of Medical Physiology E-Book (Guyton Physiology)
Chapter 1 · Functional Organization of the Human Body and Control of the "Internal Environment"
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