Cell Energy 1005-11
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This 2 page One Day of Notes was uploaded by Charlene Scavone on Saturday October 18, 2014. The One Day of Notes belongs to 1005-11 at George Washington University taught by a professor in Fall. Since its upload, it has received 57 views. For similar materials see Biology of Nutrition & Health in Biosystem Engineering at George Washington University.
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Date Created: 10/18/14
101614 Cell Energy Specialized Labor Force in Cells photosynthesis the process of making ATP molecules from light energy requires pigments pigments any substance that can absorb light energy chloroplasts where photosynthesis occurs cellular respiration extracting energy from organic molecules anaerobic energy production is universal and doesn t require oxygen aerobic energy production requires oxygen and mitochondria but produces a lot more energy Energy in Living Systems metabolism is the sum of all chemical reactions in the body basal metabolic rate basal energy expenditure measured after sleeping 8 hours and fasting for 12 resting metabolic rate rate while just sitting depend on a variety of factors including basal metabolism genetics activity diet stress every ten years your RMR reduces by 10 estimate equation age sex height weight women have more fat men have more muscle women need a fat reserve for pregnancy more muscle necessitates more calories metabolic pathways are coupled anabolic and catabolic reactions can be comprised of several intermediates each intermediate has its own enzyme Enzyme Function enzymes depend on random collisions multiple enzymes can be located close together this maximizes molecular collisions What Is Energy metabolism follows the laws of thermodynamics energy is the capacity to do work and make changed potential energy chemical stored mechanical nuclear gravitational kinetic energy electromagnetic heat emitted all the time mechanical sound electrical The Laws of Thermodynamics energy is neither created nor destroyed it simply changes states the natural tendency of the universe is to become less organized and it takes massive amounts of energy to form organized systems Thermo Effects of Feeding cells must capture store and use energy to counteract the effects of the universe however ATP production also produces heat energy Why Do We Need Heat Energy to power the reactions in our cells some reactions require energy ATP can also power enzymes
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