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Cellular respiration introduction for 9th grade biology

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Cellular respiration introduction for 9th grade biology

  1. 1. Cellular Respiration Introduction and Overview She’s getting energy from her food!
  2. 2. As always… Key concepts are underlined Vocabulary terms are in green
  3. 3. On your whiteboards What are some things you feel when you have not eaten in a long time?
  4. 4. Energy for CellsEnergy for Cells We get energyWe get energy from our foodfrom our food One gram ofOne gram of glucose releasesglucose releases 3811 calories of3811 calories of energyenergy
  5. 5. Draw this
  6. 6. To make ATP we need 2* things 1. Glucose – from food 2. Oxygen* 1. Organisms can make a little ATP without O2
  7. 7. ● Cellular Respiration = process that cells use to release the energy from glucose and store it in molecules of ATP
  8. 8. On your whiteboards What is the chemical symbol for: Oxygen Water Carbon dioxide Glucose
  9. 9. Respiration Equation: What are the reactants in this equation? What are the products in this equation? We need lots of ATP to run this fast!
  10. 10. Taller partner: How are the equations for photosynthesis and cellular respiration related to each other? Shorter partner: How are they similar? How are they different?
  11. 11. Autotroph or Heterotroph?
  12. 12. C6H12O6 ATP Light energy Chemical (food) energy Chemical energy
  13. 13. Breaking chemical bonds in sugarBreaking chemical bonds in sugar releases energyreleases energy That energy isThat energy is stored instored in molecules ofmolecules of ATPATP
  14. 14. On your whiteboards What is RELEASED when chemical bonds are broken? So…what is STORED in chemical bonds?
  15. 15. There are 3 stages to aerobic cellular respiration
  16. 16. How Cells Make ATP Glucose Glycolysis O2 Present O2 Absent Broken glucose goes to mitochondria Mitochondria makes lots of ATP Fermentation Alcohol Lactic Acid
  17. 17. How do cells get the energy out of glucose? – Stage 1 GlycolysisGlycolysis Cells take in glucose and break it in half - this is glycolysis 2 ATP are made energy!
  18. 18. If no OIf no O22  anaerobic respirationanaerobic respiration 2 ATP only also called fermentation
  19. 19. 2 Types of Fermentation AlcoholAlcohol FermentationFermentation Yeast and bacteria
  20. 20. Lactic Acid FermentationLactic Acid Fermentation  muscle cells, yeast, bacteria
  21. 21. 11-2-16 Warm up  Do all living things require oxygen to make ATP? Explain.
  22. 22. If O2 is available  aerobic respiration!aerobic respiration! Sugar molecules sent to mitochondria  36 ATP made 36 ATP!
  23. 23. 2 ATP 36 ATP!
  24. 24. Stage 2  Citric AcidCitric Acid CycleCycle (aka Kreb's cycle)  happens in the matrix  Reactant: ½ sugar  Products: 2 ATP, CO2, electron carrier NADH
  25. 25. Mitochondria  ElectronElectron TransportTransport ChainChain  happens on the cristae  Reactants: O2, NADH  Products: H2O, 34-36 ATP
  26. 26. The electron transport chain O2 e- H+ H+
  27. 27.
  28. 28. Comparing Photosynthesis andComparing Photosynthesis and Cellular RespirationCellular Respiration Photosynthesis vs. Cellular RespirationPhotosynthesis vs. Cellular Respiration PhotosynthesisPhotosynthesis Cellular RespirationCellular Respiration FunctionFunction Energy storage byEnergy storage by making glucosemaking glucose Energy release byEnergy release by breaking downbreaking down glucoseglucose LocationLocation ChloroplastsChloroplasts MitochondriaMitochondria ReactantsReactants COCO22 and Hand H22OO CC66HH1212OO66 and Oand O22 ProductsProducts CC66HH1212OO66 and Oand O22 COCO22 and Hand H22OO EquationEquation COCO22 + H+ H220 C0 C66HH1212OO66 + O+ O22 OO22 + C+ C66HH1212OO66 COCO22 + H+ H22OO
  29. 29. So can you… 1. Write the equation for respiration in symbols and words? 2. Name the 3 stages of aerobic cellular respiration and the reactants and products for each stage?