Final answer:
The goal of repaying oxygen debt is indeed to regenerate creatine phosphate and ATP in the muscle fibers, making the statement true. Oxygen debt is the amount of oxygen required post-exercise to restore muscle energy reserves and handle metabolic by-products like lactic acid.
Step-by-step explanation:
The student's statement, "One of the goals of repaying oxygen-debt is to re-generate creatine phosphate and ATP in the muscle fiber", is true. After intense muscle activity, when oxygen becomes scarce and ATP is quickly depleted, the body incurs an oxygen debt. This term refers to the additional oxygen required after exercise to rebuild depleted ATP and creatine phosphate stores, convert lactic acid back to pyruvic acid, and normalize other body systems affected by exercise.
The oxygen debt is critical for restoring muscle metabolism to its resting state. The ATP generated during exercise is first used from existing stores and then from creatine phosphate, which provides a fast way to replenish ATP but only lasts for about 15 seconds. Restoring these energy reserves is essential to ensure muscles are prepared for future contractions and activity.