If you decide to ride your bike at a moderate to fast pace for a long period of time, your blood pressure drops and heart rate increases. Once you stop the exercise, how does your body respond to resume a normal heart rate and blood pressure?
What will be an ideal response?
Ultimately, because the internal environment has moved away from homeostasis, negative feedback mechanisms are used to counter the stimuli that acted on the controlled variables. Because cardiac output increased during exercise, it only makes sense for the rate of contraction to slow as a means to reestablish the homeostatic heart rate. In addition, blood vessels would somewhat constrict to counter the exercise-induced dilation, thus elevating blood pressure.
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