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Energy Transfer in the Body

Energy Transfer in the Body. Chapter 6. Energy Systems Power vs Capacity. Max Power Max Capacity Moles/min Total Moles. ATP-CP 3.6 0.7. Anaerobic Glycolysis 1.6 1.2. Aerobic 1.0 90.0. Efficiency of ATP Resynthesis. Substrate-level phosphorylation – 30%

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Energy Transfer in the Body

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  1. Energy Transfer in the Body Chapter 6

  2. Energy SystemsPower vs Capacity Max Power Max Capacity Moles/min Total Moles ATP-CP 3.6 0.7 Anaerobic Glycolysis 1.6 1.2 Aerobic 1.0 90.0

  3. Efficiency of ATP Resynthesis • Substrate-level phosphorylation – 30% • Oxidative phosphorylation – 40 to 50% • Energy not conserved is released as heat

  4. Regulation of Energy Metabolism • Compounds that either inhibit or activate enzymes at key control points in the oxidative pathways modulate regulatory control of glycolysis and the citric acid cycle • Greatest effect exerted by ADP levels • Regulators are redundant

  5. Regulation of Fat/CHO Use • Fat use is related to FFA concentration in plasma • Regulators that increase lipase activity increase fat use • Epinephrine, norepinephrine, & glucagon increase fat mobilization • Lactic Acid & Insulin decrease fat mobilization

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