KAAP430 Chapter Notes - Chapter 2: Oxidative Phosphorylation, Creatine Kinase, Carbohydrate Metabolism
21 Mar 2017
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Document Summary
Energy is released when chemical bonds are broken. Amount used during exercise is related to: Muscle, liver glycogen stores: limited: prolonged, intense exercise: rely heavily on dietary sources of starches, sugars replenish carbohydrate reserves. Only energy source used by brain tissue. Provide large portion of energy used during prolonged, less intense exercise. Less available for cellular metabolism because must be 1st reduced: triglyceride glycerl + free fatty acids (ffas). Other types of fats: non-energy-producing: phospholipids, steroids. Severe energy depravation (starvation) ffas for atp. Gluconeogenesis process by which protein or fat glucose. Lipogenesis process by which protein ffas. May supply < 5-10% of energy needed to sustain prolonged exercise. Only amino acids can be used for energy. Free energy must be released from chemical compounds at a controlled rate to be useful. Availability of the primary substrate (mass action effect) Increased availability of substrate increased activity of specific pathway.
