During exercise, the increase in respiration rate and heartbeat speed are driven by the need for

Question

Quizplus · Accepted Answer

The increase in respiration rate and heartbeat speed during exercise is driven by the increased demand for oxygen in muscle cell mitochondria. This is because mitochondria require oxygen to produce ATP, which provides energy for muscle contractions during exercise. As a result, the body must increase its respiration rate and heartbeat in order to deliver more oxygen to the muscles.

During Exercise, the Increase in Respiration Rate and Heartbeat Speed