27 Ch. 7 - Chapter7Notes 18:42 Whydoyouneedtobreath? o...

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Chapter 7 Notes 18:42 Why do you need to breath? o Cellular respiration o Respire in the sense that the reactions that yield energy are overall “oxidative” They are a series of oxidation/reduction reactions Biochemically (inside cells), oxidation and reduction are always linked Where’s the other 53% of energy? o Heat! Cellular respiration in cells is the process where fuel (glucose or fatty acids) are  oxidized o It occurs in all of our cells (except in mammalian erythrocytes which are not  true cells) and provides the cell’s chief source of energy What is processed cane sugar (food or a food additive)? o Do we need processed cane sugar in our diets at all? Where do the complex fuels come from? o Carbs and lipids The Process: o 1. Geography…where in the cell are the reactions taking place? o 2. What is the energy budget…in what form is the energy? How many NADH?  How many ATP? o 3. What is the carbon budget in relation to the original glucose? Start with C6  and end up with 6CO2 During digestion, monosaccharides or fatty acids are absorbed though capillaries  in intestinal villi and transported to the liver Liver stores glycogen (polysaccharide) Carbohydrate metabolism is primarily concerned with glucose metabolism Lipid metabolism is primarily concerned with fatty acid metabolism Insulin (hormone) stimulates glucose movement into cells
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This note was uploaded on 11/14/2010 for the course BIO 1105 at Virginia Tech.

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27 Ch. 7 - Chapter7Notes 18:42 Whydoyouneedtobreath? o...

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