Why does one continue to breathe heavy after rigorous physical activity has stopped?
A) The diaphragm is waiting for its acetylcholine to run out.
B) The body requires more oxygen to restore levels of ATP and creatine phosphate.
C) The lungs can't stop breathing until the heart rate slows down.
D) Myosin heads need more oxygen to fully detach from actin.
E) The kidneys require oxygen to dispose of excess lactate.

Question

Quizplus · Accepted Answer

After rigorous physical activity, the body requires more oxygen to restore levels of ATP and creatine phosphate. This is why the breathing rate remains elevated to meet the increased oxygen demand even after the activity has stopped. This is also known as the oxygen debt. Eventually, as the oxygen debt is repaid, the breathing rate returns to normal.

Why Does One Continue to Breathe Heavy After Rigorous Physical