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Cellular Respiration

Cellular Respiration. Ecosystem energy. Breathing is important. Aerobic capacity= highest level of exercise you can maintain using oxygen Ability of muscles to do work Energy source is glucose Need oxygen to release energy from glucose. Cellular Respiration. Alcohol fermentation yeast.

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Cellular Respiration

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  1. Cellular Respiration

  2. Ecosystem energy

  3. Breathing is important • Aerobic capacity= highest level of exercise you can maintain using oxygen • Ability of muscles to do work • Energy source is glucose • Need oxygen to release energy from glucose

  4. Cellular Respiration Alcohol fermentation yeast Lactate fermentation muscles Anaerobic respiration Co2

  5. Aerobic Cellular Respiration • Aerobic conversion of chemical energy harvested from food to ATP • Aerobic • In cristae of mitochondria • 24+ steps • Creates 36-38 ATP, h20, co2, heat • Glucose oxidation • Requires oxygen, produces co2

  6. Cellular Respiration • 4 Stages • Glycolysis • Krebs Cycle • Electron Transport Chain • Chemiosmosis

  7. Glycolysis • 1st step in Aerobic respiration • Occurs in all organisms • Takes place in cytoplasm • Needs activation energy Investment • 2 ATP • Reduces NAD+ to NADH (store E) • Breaks down glucose Net 2 ATP produced, 2 nadh

  8. Krebs Cycle • Aka Citric Acid Cycle • 2nd step in aerobic respiration • Occurs in the mitochondria • Uses the products of glycolysis (2 Pyruvic acid) • Produces co2 as waste product • Produces 2 atp, 6 NADH & 2 Fadh2 • energy harvest

  9. Electron Transport Chain • 3rd stage in aerobic respiration • Occurs in cristae of mitochondria • Use energy from glycolysis & krebs cycle (nadh from glycolysis & nadh/ fadh2 from krebs cycle) • Creates h+ gradient

  10. Chemiosmosis • Last step in cellular respiration • Electron originally from glucose end up at oxygen • H+ ions move through ATP synthase • Energy from each step used to add P back to ADP via ATP synthase • Electron & H end up at O= h2o • Use h+ gradient & atp-synthase to Produce 34 ATP & h2o • http://www.youtube.com/watch?v=kN5MtqAB_Yc

  11. Cellular Respiration

  12. Anaerobic respiration • Does not use oxygen to drive the reaction to produce atp • Does not create water as waste • Can occur un aerobic cells that run out of oxygen • Ex lactic acid fermentation-muscles • Can occur in condition when oxygen is absent • Early earth • Unique environments

  13. Yeast may use anaerobic respiration- fermentation

  14. Fermentation • Alcoholic fermentation • Anaerobic • Creates Co2 & Ethanol as waste products

  15. Lactic Acid fermentation • Anaerobic respiration • Oxygen debt • Creates lactic acid as a waste • Occurs in muscles

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