1. Lesson 2. Aerobic energy system. Aims: To revise the phosphocreatine system and lactic acid energy system. To know the key functional characteristic of the aerobic energy system. To understand the positive and negative aspects of this system.
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3. 3. Describe 2 advantages and 2 disadvantages of the phosphocreatine energy system [4]. Provides energy for 10secs. No harmful by-products One mole of ATP is re-synthesised form one mole of PC. O2 is not required. Small amount stored in muscle cells. Provides ATP re-synthesis quickly. Disadvantage. Advantage.
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5. 8. Name 2 advantages and 1disadvantage of the lactic acid energy system [3]. No delay due to the lack of O2 required. Lasts from 15-180 seconds.e.g. 400m ATP provided quickly. Lactic acid produced reduced blood pH making it more acidic preventing enzymes from functioning properly. Provides more ATP than PC system. Disadvantage. Advantage.
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9. The ETC. Krebs cycle Hydrogen ETC O2 H2O 34ATP Mitochondria matrix. Mitochondria cristae
10. The advantages and disadvantages of the aerobic energy system. No harmful by-products. Cannot provide ATP at high intensity work levels. Activity can last hours. The system cannot re-synthesis ATP instantly because of the delay in O2 transportation. Large amount of ATP is re-synthesised 36-38 moles of ATP from one mole of glycogen. Disadvantages Advantages