NS 115 - Lecture 11 - Lecture 11 September 24, 2008 Energy...

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Lecture 11 September 24, 2008 Energy Metabolism Why do we eat sugar? o Supplies energy, converting energy from the sun to our bodies o Energy is in the form of ATP o Plants take water and carbon dioxide with photons and convert it to a sugar Energy Metabolism o The process of converting energy from carbon hydrogen bonds to phosphate bonds o ATP adenosine triphosphate is a molecule that the phosphates are spring loaded onto the adenosine. When ATP is used for energy it gets converted to ADP + P (a phosphate pops off) and work is done. Out metabolism puts this lost phosphate back onto the adenosine diphosphate. o The cell has structure called mitochondria The glucose that enters the cell gets put into the cytoplasm and glycolysis begins here. They break the glucose apart and make pyruvic acid (3 carbon backbone) It requires 2 ATP to do this, but produces 4 to use (net gain of 2 ATP As pyruvate builds up it gets converted to lactic acid The lactic acid can leave the cell and go to liver to be repackaged
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This note was uploaded on 02/22/2010 for the course NS 1150 taught by Professor Levitsky during the Fall '05 term at Cornell University (Engineering School).

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NS 115 - Lecture 11 - Lecture 11 September 24, 2008 Energy...

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