BIOCHEM 2EE3 Lecture Notes - Lecture 12: Ketone Bodies, Homeostasis, Performance-Enhancing Substance
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28 Mar 2017
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Consume food to provide fuel to our body to synthesize atp. Cells need energy for housekeeping activities such as dna replication, cell division, protein synthesis, maintaining osmotic gradient of sodium and potassium ion etc. Three macronutrients that provide fuel: carbohydrates, lipids, proteins. Glucose is broken down to pyruvate through glycolysis then to acetylcoa through the pyruvate dehydrogenase reaction then to carbon dioxide through the citric acid cycle. Reducing equivalents are nadh and fadh2 which are converted to atp through the electron transport chain and oxidative phosphorylation. Fats are broken down from triacylglycerols to free glycerol and fatty acids. Glycerol will feed into glycolysis while the fatty acids will be broken down to acetylcoa through beta oxidation acetylcoa will feed into the citric acid cycle. Again, reducing equivalents are generated from beta-oxidation and the citric acid cycle are then converted to atp through electron transport chain and oxidative phosphorylation.
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