ATP-PC energy system

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Define energy
the capacity of the body to preform work
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What food fuel is used in the ATP-PC system?
Phosphocreatine
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Energy is released when..
Adenosine Triphophate (ATP) is broken down into Adenosine Diphosphate and an inorganic phosphate molecule (ADP + Pi)
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Where does the ATP-PC system reaction occur?
Sarcoplasm of muscle cells
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Two advantages of ATP-PC system
no by-products - immediate release of energy - no oxygen required - rapid resysnthesis - PC stores replenished with 2-3mins after exercise -
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Two disadvantagea of the ATP-PC system
Only lasts 10seconds before fatigue occurs - limited supply of PC - resynthesis of PC can only happen when Oxygen is present (at rest) - 1:1 yield
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What is the energy yield of the ATP-PC system?
1ATP per phosphocreatine (PC) molecule
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How is ATP resysthesised?
Chemoreceptors detect increased levels of ADP - creatine kinase is released - breaksdown phosphocreatine releasing Phosphate molecule - phosphate binds with ADP
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Why is ATP-PC system a coupled reaction?
Breaking down ATP is exothermic - resysthesis is endothermic
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What are the affects of training on ATP-PC system
Increase in ATP / PC stores (increase time you can work at maximal effort) - faster detection of ADP - lactic threshold is delayed - increase in maximal power output
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What are the controlling enzymes of the ATP-PC system
ATPase, Creatine kinase
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Other cards in this set

Card 2

Front

What food fuel is used in the ATP-PC system?

Back

Phosphocreatine

Card 3

Front

Energy is released when..

Back

Preview of the front of card 3

Card 4

Front

Where does the ATP-PC system reaction occur?

Back

Preview of the front of card 4

Card 5

Front

Two advantages of ATP-PC system

Back

Preview of the front of card 5
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