17 - Glucose, Part 2 - Glucose Catabolism I Glucose...

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Unformatted text preview: Glucose Catabolism I Glucose Catabolism II Learning Objective Homolactic fermentation Learning Objectives Alcoholic fermentation Metabolism of Hexoses Other Than Glucose The Pentose Phosphate Pathway Glycolysi Glycolysis Fig. 14-3 Pyruvate: H 3 C-C-C O O- 3 O One Glucose Molecule Yields Energy Pl T o P r ate Molec le Plus Two Pyruvate Molecules First Stage of Glycolysis Second Stage of Glycolysis Fig. 15-7 Fig. 15-15 Metabolic Fates of Pyruvat Metabolic Fates of Pyruvate Fig. 15-16 1. Aerobic conditions: completely oxidized 2. Anaerobic conditions i 3. Anaerobic conditions in completely oxidized to CO 2 and H 2 O via the citric acid cycle conditions in muscle: reduced to lactate conditions in yeast: ethanol + CO 2 Homolactic Fermentation Homolactic Fermentation Occurs in muscle, particularly during vigorous activity when: during vigorous activity when: - High demand for ATP Short supply of oxygen- Short supply of oxygen Overall process of anaerobic glycolysis Glucose + 2 ADP + 2 P i ! 2 lactate + 2 ATP + 2 H 2 O + 2 H + Page 502 Muscle fatigue and soreness is caused by low pH, not by lactate. Muscle can work long if the pH is kept constant Anaerobic Glycolysis: Low-Efficient but Fast Glucose ! 2 lactate + 2 H + " G 0 = 196 kJ/mo The rate of ATP production by anaerobic glycolysis can be up...
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17 - Glucose, Part 2 - Glucose Catabolism I Glucose...

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