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When John begins to run, his muscles utilize oxygen and produce carbon dioxide. His body has receptors monitoring these conditions. When the levels stimulate a receptor, the heart rate and respiratory rate elevate to accommodate the change. This is an example of a ________ reflex.

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Answer: Cardiovascular telex.

Explanation: During physical exercises which involves running, there is a reduction in the systemic vascular resistance produced and these constitutes a change in the heart rate and respiratory rate caused by the neural mechanisms which control the cardiovascular system which regulate the circulation of adequate oxygen supply and release carbon dioxide.

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