Final answer:
Decreased stroke volume is not a response to exercise, whereas increased heart rate, breathing rate, and cardiac output are typical physiological responses to physical activity.
Explanation:
Decreased stroke volume is NOT a response to exercise. Stroke volume is the amount of blood pumped by the heart in one contraction, and during exercise, it typically increases to meet the body's demands for oxygen and nutrients.
Increased heart rate, increased breathing rate, and increased cardiac output are all common responses to exercise. These physiological changes help deliver more oxygen and nutrients to the muscles during physical activity.
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