3 - Metabolic System and Exercise

3 - Metabolic System and Exercise - Metabolic System and...

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Metabolic System and Exercise Bioenergetics
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All the chemical reactions of the body = Catabolism + Anabolism Metabolism
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Catabolism and Anabolism Catabolic reactions - breakdown providing energy Anabolic reactions – build up requiring energy Exchange of energy requires use of ATP molecule.
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• ATP ↔ ADP + P i + energy ATP: Energy Currency of the Cell
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High-energy Phosphates Adenosine triphosphate - The energy currency Powers all of cell’s energy requiring processes Potential energy extracted from food Energy is stored in bonds of ATP Energy is transferred to do work
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1. Phosphocreatine (PC)
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Phosphocreatine Anaerobic resynthesis of ATP Requires the enzyme creatine kinase Cells store ~ 4–6 times more PCr than ATP
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2. Glycolysis
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Glycolysis Produces ATP through breakdown of glucose Produces 2-3 ATP End product = pyruvic acid Anaerobic process
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3. Oxidative Energy Production Aerobic process
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3 - Metabolic System and Exercise - Metabolic System and...

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