Final answer:
Rate-responsive pacemakers can detect physical activity and adjust heart rate accordingly, increasing it during exercise to meet the body's needs for blood and oxygen.
Step-by-step explanation:
True, rate-responsive pacemakers are indeed programmed to alter heart rate to match the level of physical activity. These advanced medical devices include sensors that detect body motion and breathing, allowing them to increase the heart rate during exercise in response to the body's increased needs for blood and oxygen. They adjust the pacing rate accordingly to support the heart's ability to deliver an adequate blood supply to the body during various levels of physical exertion, such as during a workout or when climbing stairs.