Creatine phosphate provides enough additional energy to sustain muscle activity for Group of answer choices2-3 seconds30-40 seconds15 secondsminutes to hours
Question
Creatine phosphate provides enough additional energy to sustain muscle activity for
- Group of answer choices
- 2-3 seconds
- 30-40 seconds
- 15 seconds
- minutes to hours
Solution
Creatine phosphate is an important molecule in the energy metabolism of muscle cells. It serves as a quick energy reservoir that can rapidly regenerate ATP (adenosine triphosphate), which is the primary energy carrier in cells.
Understanding the Duration of Energy Supply
- Immediate Energy Source: When muscles begin to contract, ATP is used. However, the stored ATP in muscle cells is limited, lasting only a few seconds.
- Role of Creatine Phosphate: After the initial ATP is depleted, creatine phosphate donates a phosphate group to ADP (adenosine diphosphate) to replenish ATP quickly.
- Duration Calculation: The energy provided by creatine phosphate can sustain high-intensity muscular activities typically for about 10 to 15 seconds. Beyond this, other energy systems, like glycolysis and aerobic respiration, become more significant.
Conclusion
From the given options, the correct answer is 15 seconds. This reflects the role of creatine phosphate in providing a swift, albeit short-lived, supply of energy for muscle activity.
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