378893-Respiration

378893-Respiration - BIOLOGY - 12 Advanced Introduction :...

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Unformatted text preview: BIOLOGY - 12 Advanced Introduction : Organic compounds store potential energy. With the help of enzymes a cell systematically breaks-down complex organic molecules ( E ) to simpler substances ( E ) Some of energy released can be used to do work. The rest ( most ) lost as heat. Complex org. molec. ( E ) simple substances ( E ) Systematic breaking-down energy Cellular activities Heat UNIT1 : Biological energetics Mitochondria Respiration : breaking-down of food molecules to produce energy. There are two types of respiration : Aerobic respiration Anaerobic respiration Breaking-down of food molecules Breaking-down of food molecules In the presence of oxygen in the absence of oxygen to produce energy to produce energy Respiration Glucose lactic acid + energy C 6 H 12 O 6 2 C 3 H 5 O 3 + energy Glucose alcohol + CO 2 + energy C 6 H 12 O 6 2 C 2 H 5 OH + 2 CO 2 + energy ucose + oxygen carbon dioxide + water + energy C 6 H 12 O 6 + O 2 6CO 2 + 6 H 2 O + 38 ATP Respiration Type of respiration Aerobic Anaerobic Oxygen With Without Oxidation of glucose Complete Incomplete Energy yield High Low Products CO 2 and H 2 O Lactic acid or alcohol + CO 2 Compare between aerobic and anaerobic respiration. Energy produced in respiration can be used in : 1. Muscle working. 2. Active transport. 3. Nerve impulses. 4. Biosynthesis. 5. Keeping body temperature constant. BUT remember that : not all energy is used up a lot is lost as heat. Respiration Compare respiration with combustion : Respiration Respiration Combustion Inside the cell Outside the cell Enzyme regulated No enzymes Energy produced step-by-step Energy produced at once Slow Fast Occur in the absence of O 2 . Occur totally in cytoplasm . The cell is incompletely oxidize glucose....
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This note was uploaded on 12/04/2009 for the course BIOL 230 taught by Professor Gibson during the Spring '09 term at Tennessee Martin.

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378893-Respiration - BIOLOGY - 12 Advanced Introduction :...

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