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Negative feedback systems work to counteract deviations from a set point, restoring the internal environment back to its desired state.When body temperature rises above the set point, such as during exercise, thermoreceptors detect this change and trigger responses to cool the body down, such as sweating and vasodilation of blood vessels near the skin.Conversely, when body temperature drops below the set point, thermoreceptors initiate responses to conserve heat, such as shivering and vasoconstriction.

Negative feedback systems work to counteract deviations from a set point, restoring the internal environment back to its desired state. An example of negative feedback is the regulation of body temperature. When body temperature rises above the set point, such as during exercise, thermoreceptors detect this change and trigger responses to cool the body down, such as sweating and vasodilation of blood vessels near the skin. Conversely, when body temperature drops below the set point, thermoreceptors initiate responses to conserve heat, such as shivering and vasoconstriction.

Positive feedback systems, on the other hand, amplify deviations from the set point, leading to a further increase or decrease in the variable being regulated. One example of positive feedback is blood clotting. When a blood vessel is injured, platelets adhere to the site of injury and release chemical signals that attract more platelets to the area. This cascade of events continues until a blood clot forms and stops the bleeding, ultimately restoring homeostasis.