Energy Concepts

Energy Concepts

1. ATP

   • Adenosine Triphosphate is a high energy compound in the body. It is the only immediately usable source of energy in the body
     • ATP/PC System
       • Energy provided by coupled reactions
       • When ATP levels fall and ADP levels rise enzyme creatine kinase
         • Breaks down PC bond releasing energy
           • Resynthesise ADP back into ATP
             • Endothermic reaction
       • Anaerobic
       • Takes place in the sarcoplasm of muscle cells
       • 1 PC resynthesising only one ATP
         • Only provide energy for 8-12 seconds
     • Lactic Acid System
       • Breaks down the fuel glucose via coupled reactions to resynthesise ADP back into ATP
         • Glucose comes from the digestion of carbohydrates or from Glycogen
         • Decrease in PC stores activates the enzyme glycogen phosphorylase to break down glycogen into glucose
           • Further broken down in a series of reactions called glcolysis.
       • Takes place in muscle sarcoplasm and doesn't require oxygen
         • Anaerobic glycolysis