Cellular Respiration What we do with our energy
 
Anaerobic  vs.  aerobic <ul><li>Uses no oxygen </li></ul><ul><li>Makes a little energy </li></ul><ul><li>Uses oxygen </li>...
Overview Of Cellular Respiration <ul><li>Cellular respiration is the process that releases energy by breaking down glucose...
<ul><li>To release energy from food molecules and make ATP! </li></ul><ul><li>Why do we need ATP? </li></ul><ul><ul><li>To...
Summary equation for Respiration
The pathways
Stage 1- The break down of glucose This happens regardless of the amount of oxygen <ul><li>Glycolysis- Breakdown of glucos...
<ul><li>Glycolysis uses 2ATP molecules but produces 4ATP molecules so there is a net gain of 2 molecules </li></ul>
What if there is no Oxygen?
Anaerobic respiration <ul><li>Not enough oxygen for aerobic respiration </li></ul><ul><li>Fermentation-releases energy fro...
Lactic acid vs alcoholic  <ul><li>No oxygen </li></ul><ul><li>Occurs in muscles </li></ul><ul><li>Pyruvates   lactate </l...
 
9.2 The Krebs cycle and Electron Transport
Stage 2: Production of ATP <ul><li>Krebs cycle </li></ul><ul><ul><li>Takes place in mitochondria </li></ul></ul><ul><li>Th...
The Krebs Cycle <ul><li>Aerobic (requires oxygen) </li></ul><ul><li>Breaks pyruvic acid down into CO 2  in a series of ene...
The Electron Transport Chain <ul><li>Uses high-energy electrons from the Krebs Cycle to convert ADP into ATP. </li></ul><u...
Overall <ul><li>Cellular Respiration breaks down C 6 H 12 O 6 . </li></ul><ul><li>It produces H 2 O and CO 2 </li></ul><ul...
Comparing Photosynthesis & Cellular Respiration Photosynthesis Cellular Respiration  Function Energy capture Energy Releas...
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Cell respiration

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Cell respiration

  1. 1. Cellular Respiration What we do with our energy
  2. 3. Anaerobic vs. aerobic <ul><li>Uses no oxygen </li></ul><ul><li>Makes a little energy </li></ul><ul><li>Uses oxygen </li></ul><ul><li>Makes a lot of energy </li></ul>
  3. 4. Overview Of Cellular Respiration <ul><li>Cellular respiration is the process that releases energy by breaking down glucose and other molecules in the presence of oxygen. </li></ul><ul><ul><li>Mitochondria (mainly) </li></ul></ul><ul><li>3 phases </li></ul><ul><ul><li>Glycolysis* </li></ul></ul><ul><ul><li>Krebs cycle </li></ul></ul><ul><ul><li>The electron transport chain </li></ul></ul>
  4. 5. <ul><li>To release energy from food molecules and make ATP! </li></ul><ul><li>Why do we need ATP? </li></ul><ul><ul><li>To run chemical reactions that keep us alive and functioning. </li></ul></ul>Purpose of cellular respiration?
  5. 6. Summary equation for Respiration
  6. 7. The pathways
  7. 8. Stage 1- The break down of glucose This happens regardless of the amount of oxygen <ul><li>Glycolysis- Breakdown of glucose in the cytoplasm </li></ul><ul><ul><li>Anaerobic </li></ul></ul><ul><ul><li>Breaks glucose into 2 pyruvate </li></ul></ul><ul><li>2 ATPs required to start the reaction, 4 are produced. ( gain of 2 ATPs ) </li></ul>
  8. 9. <ul><li>Glycolysis uses 2ATP molecules but produces 4ATP molecules so there is a net gain of 2 molecules </li></ul>
  9. 10. What if there is no Oxygen?
  10. 11. Anaerobic respiration <ul><li>Not enough oxygen for aerobic respiration </li></ul><ul><li>Fermentation-releases energy from food molecules by producing ATP in the absence of oxygen. (Anaerobic = no oxygen) </li></ul><ul><li>Two types: alcoholic fermentation, lactic acid fermentation </li></ul>
  11. 12. Lactic acid vs alcoholic <ul><li>No oxygen </li></ul><ul><li>Occurs in muscles </li></ul><ul><li>Pyruvates  lactate </li></ul><ul><li>Occurs so muscles can continue making ATP </li></ul><ul><li>Get lactate build up in muscles </li></ul><ul><li>Causes soreness </li></ul><ul><li>No oxygen </li></ul><ul><li>Pyruvate  carbon dioxide & ethanol </li></ul><ul><li>Seen in yeast and fungus </li></ul><ul><li>Used to make beverages, food, makes dough rise </li></ul>
  12. 14. 9.2 The Krebs cycle and Electron Transport
  13. 15. Stage 2: Production of ATP <ul><li>Krebs cycle </li></ul><ul><ul><li>Takes place in mitochondria </li></ul></ul><ul><li>The Krebs cycle occurs twice for each glucose molecules </li></ul><ul><ul><li>Once for each pyruvate </li></ul></ul><ul><ul><li>Remember 2 pyruvate =1 glucose </li></ul></ul>
  14. 16. The Krebs Cycle <ul><li>Aerobic (requires oxygen) </li></ul><ul><li>Breaks pyruvic acid down into CO 2 in a series of energy-extracting reactions </li></ul><ul><li>Yields 2 ATPs and high-energy electrons for the electron transport chain </li></ul>
  15. 17. The Electron Transport Chain <ul><li>Uses high-energy electrons from the Krebs Cycle to convert ADP into ATP. </li></ul><ul><li>Makes 32 ATP </li></ul>
  16. 18. Overall <ul><li>Cellular Respiration breaks down C 6 H 12 O 6 . </li></ul><ul><li>It produces H 2 O and CO 2 </li></ul><ul><li>It produces 36 ATPs! </li></ul><ul><ul><li>2 GLYCOLYSIS </li></ul></ul><ul><ul><li>2 KREBS CYCLE </li></ul></ul><ul><ul><li>32 ETC </li></ul></ul>
  17. 19. Comparing Photosynthesis & Cellular Respiration Photosynthesis Cellular Respiration Function Energy capture Energy Release Location Chloroplasts Mitochondria Reactants CO 2 & H 2 O C 6 H 12 O 6 & O 2 Products C 6 H 12 O 6 & O 2 CO 2 & H 2 O Equation 6CO 2 + 6H 2 O -> C 6 H 12 O 6 + 6O 2 C 6 H 12 O 6 + 6O 2 > > > 6CO 2 + 6H 2 O

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