Final answer:
The statement that is NOT true about creatine phosphate regeneration is that it powers muscle contraction for only the first 10 seconds. Creatine phosphate actually provides energy for approximately 15 seconds during muscle contraction.
Step-by-step explanation:
The statement C) Creatine phosphate regeneration powers the muscle contraction for the first 10 or so seconds is NOT true of creatine phosphate regeneration in anatomy. The creatine phosphate system does provide energy to muscles, especially during the first few seconds of intense activity, but this system typically supplies energy for about 15 seconds, not just 10. Creatine phosphate regeneration occurs when a muscle is at rest, storing excess ATP energy in the form of creatine phosphate. Then, as muscle contraction begins and demand for ATP increases, creatine phosphate quickly donates a phosphate group to ADP to form ATP, this process occurs in the sarcoplasm of muscle fibers. After about 15 seconds, the muscle must rely on other sources like glycogen through a process known as anaerobic glycolysis.