A2 PE OCR Exercise Phys ATP-PC System

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  • Created by: Sorcha
  • Created on: 16-02-14 11:08
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  • ATP-PC System
    • We use phosphocreatine as the FUEL to replace ATP by combining ADP + P
      • Used for an activity that lasts between 3+10 seconds
      • Used for HIGH intensity work e.g. 100m
      • PC is stored in the sarcoplasm of the muscle cell.
    • PC --> Pi + C + Energy (exothermic)
      • Energy + ADP + Pi --> ATP (endothermic)
        • These 2 reactions are called a COUPLED REACTION
          • PC --> Pi + C + Energy (exothermic)
            • Energy + ADP + Pi --> ATP (endothermic)
              • These 2 reactions are called a COUPLED REACTION
                • These are facillitated by the enzyme CREATINE KINASE
                • 1 mole of PC = 1 mole of ATP
          • These are facillitated by the enzyme CREATINE KINASE
          • 1 mole of PC = 1 mole of ATP
    • ADVS: Fast as PC stored in the muscles, no O2 required, PC can be resynthesized quickly, no harmful by products
    • DISADVS: only a limited store of PC in the muscles, only 1 ATP is made, only lasts 10 seconds
    • EFFECTS OF TRAINING: Increased PC stores + ATP stores. ATPPC- Lactic acid threshold is delayed
      • train using ANAEROBIC TRAINING
      • could possibly last 1-2 seconds LONGER.

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