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Btec national unit 1 energy systems
The document discusses different energy systems in the body. It asks where energy comes from and which nutrients provide energy. It then explains three main energy systems: the phosphocreatine (PC) system which provides energy for 10 seconds; the anaerobic lactic acid system which lasts 60-90 seconds; and the aerobic system which provides long-term energy through breakdown of glucose and fat but requires oxygen.
Btec national unit 1 energy systems
- 2. Where does energycome from? Which nutrients give us energy? How do we use it? Does it run out? What does anaerobic and aerobic mean? Shorter video Longer video Type in ‘energy systems’ into YouTube and find your own video. Even better – produce your own on ShowMe or your smartphone…
- 3. ©Subject Support 2010. • Phosphocreatine • Lactic Acid System • Aerobic Energy System
- 4. ©Subject Support 2010. • ATP ( Adenosine Tri-Phosphate ): Bodies usable form of energy • Combines with water to release energy • ATP provides energy for muscle contractions – 3 seconds worth
- 5. ©Subject Support 2010. • ATP and Phosphocreatine make up the PC system • PC is a high energy compound • Stored in muscles • Fuels the next 5-7 seconds = 10 seconds total
- 6. ©Subject Support 2010. • Creatine Phosphate is broken down to make ATP • Anaerobic System ( No O2 ) • Used when: Sprinting / Jumping / Throwing / Tackling
- 7. ©Subject Support 2010. • Anaerobic • High Intensity activities • Used when ATP/PC has run out • Breakdown of Muscle Glycogen
- 8. ©Subject Support 2010. • Anaerobic Glycolysis • Lasts 60 – 90 seconds • E.G. 400M • Lactic Acid is produced – Leads to fatigue ( Burning Sensation )
- 9. ©Subject Support 2010. • Needs O2 to breakdown Glucose / Fat • Long-term energy • Produces CO2 and H20 • Lower Intensity activities
- 10. ©Subject Support 2010. • Takes longer to breakdown Fats than Glucose • Breakdown of Glucose = 38 ATP. Fats = 129 ATP • E.G. Marathon, Long Distance Swimming / Cycling