Q. What is an instance of negative feedback of the homeostatic regulation?

Negative feedback happens when the response to a given action generates an effect that inhibits that action For instance, when the carbon dioxide concentration in blood is high the pulmonary respiration is stimulated for the CO2 excess to be expelled through expiration. Hyperventilation, though, lowers the carbon dioxide concentration in blood excessively a lot generating a negative feedback that commands the reduction of the respiratory frequency.

Negative feedback is the major mechanism of homeostasis and it occurs in a variety of processes, such as in blood pressure control, muscle contraction, glycemic control and so on.