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Question

ATP is replenished in the muscles in 3 ways.which of the following is not one of them


A

From creatine phosphate (anaerobic)

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B

By glycolysis from glycogen (anaerobic)

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C

By cellular respiration (aerobic respiration)

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D

Breakdown of protein

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Solution

The correct option is D

Breakdown of protein


All muscle cells produce adenosine triphosphate(ATP) molecules which are used to power the movement of the myosin heads. Muscles have a short-term store of energy in the form of creatine phosphate which is generated from ATP and can regenerate ATP when needed with creatine kinase.

Once ATP and phosphocreatine stores are depleted, as during intense muscle activity, anaerobic respiration kicks in.

Now the stored glycogen starts to be used; breakdown of glycogen to lactic acid starts to take place to supply for the high ATP need. The lactic acid is later converted back to glucose in the liver.

Protein breakdown does not take place in muscle cells.


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