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Old 09-30-2011
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MusculoSkeletal Source of Energy for the Muscle in 10 to 100 Seconds!

A study is conducted to determine energy utilisation during different periods of exercise. A isolated and perfused skeletal muscle is subjected to stimulation lasting 100 sec. The major source of energy used during 10 to 100 sec of vigorous muscle stimulation is due to

A. Gluconeogenesis
B. Glycogen Breakdown
C. Hydrolysis of creatinine phosphate
D. Hydrolysis of stored ATP
E. Oxidation of fatty acid
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Old 09-30-2011
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D. Hydrolysis of stored ATP
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I am not sure but i think skeletal m. has a store of glycogen and glucose not ATP so ill go with glycogen breakdown B
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i think it is B
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C. Breakdown of creatinine phosphate.
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Since it's vigorous stimulation, i'm thinking B
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B-Glycogen Breakdown
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B
First its glycogen breakdown, then gluconeogenesis
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Old 10-03-2011
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Default Confusion

This is from Kaplan Qbank

And the anwser by them is Glycogen breakdown.

But
In First Aid Page 113 its given that for 100 m sprint the energy required is utilised from stored ATP, Creatine Phosphate and anaerobic glycolysis. Normally a sprinter takes 10 sec for that and in the above question the energy utilised during 10 sec to 100 sec is being asked. In my view since 100 sec is also not such a long time that body starts glycogen breakdown and uses glucose of glycogen breakdown for energy generation, it should use either utilise the stored glucose for anaerobic glycolysis or energy from ATP or Creatine Phosphate for this 100 sec period. So either option C or D may be the choice

Please clarify my doubt.
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