1. ENERGY SYSTEMS LESSON 2 ATP-PC Energy System ATP-PC Energy System

2. LEARNING OBJECTIVES 1. Am I able to explain the ATP-PC System? 2. Can I evaluate the ATP-PC System?

3. STARTER – Exam Questions JANUARY 2005 1a)Define the terms energy, work and power, giving the units of measurements for each.(3 marks) 1a)Define the terms energy, work and power, giving the units of measurements for each.(3 marks) b)ATP is a most important compound. Explain why ATP plays such a major role during physical activity.(3 marks)

4. ATP-PC ENERGY SYSTEM Explain what is happening below: ATPase ATPase ATPADP + P + Energy Muscular Contraction

5. ATP-PC ENERGY SYSTEM Explain what is happening below: Creatine Kinase Creatine Kinase PCC + P + Energy Re-synthesis of ATP

6. ATP-PC ENERGY SYSTEM Explain what is happening below: ADP + P + Energy ATP Energy from the Energy from the breakdown of PC breakdown of PC

7. TASK Explain how ATP is re-synthesised in the APT- PC system Explain how ATP is re-synthesised in the APT- PC system You must include information on the following: You must include information on the following: Endothermic Reaction Endothermic Reaction Exothermic Reaction Exothermic Reaction Use of Enzymes Use of Enzymes COUPLED REACTION COUPLED REACTION

8. TRAINING ADAPTATIONS Anaerobic Training overloads the ATP/PC system and increases the body’s muscle stores of ATP and PC This delays the threshold between the ATP/PC and the Lactic Acid System Therefore increases the potential duration of high intensity exercise for up to 1-2 seconds

9. ADVANTAGES OF THE ATP- PC ENERGY SYSTEM Discuss what you think the advantages of the ATP-PC Energy System Discuss what you think the advantages of the ATP-PC Energy System Come up with 3 advantages Come up with 3 advantages

10. ADVANTAGES OF THE ATP-PC ENERGY SYSTEM No O2 required PC stored in muscle cell as readily available energy source Very quick re-synthesis of ATP Provides energy for high intensity exercise No harmful by-products that will cause fatigue Recovery for this system is very quick due to quick re-synthesis of PC

11. DISADVANTAGES OF THE ATP-PC ENERGY SYSTEM Discuss what you think the disadvantages of the ATP-PC Energy System Discuss what you think the disadvantages of the ATP-PC Energy System Come up with 2 disadvantages Come up with 2 disadvantages

12. DISADVANTAGES OF THE ATP-PC ENERGY SYSTEM Only a small amount of ATP and PC stored in muscle cells Only one ATP is re-synthesised for one PC Only provide energy to re-synthesise ATP for a maximum of 10 seconds

13. FACTS OF THE ATP-PC SYSTEM The ATP/PC System works under Anaerobic conditions The fuel for this system is Phosphocreatine This reaction takes place in the sarcoplasm of the muscle cells

14. PLENARY Discuss how you think ATP can be re- synthesised during exercise lasting longer than 10 seconds Discuss how you think ATP can be re- synthesised during exercise lasting longer than 10 seconds