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Cellular Respiration

Cellular Respiration. Chapter 7. Obtaining Food. Autotrophs – producers – photosynthesis Heterotrophs – consumers – cellular respiration. Harvesting the Energy in Food. Main Forms of Energy. Energy > ability to perform work Kinetic > Energy of motion > Thermal energy

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Cellular Respiration

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  1. Cellular Respiration Chapter 7

  2. Obtaining Food • Autotrophs – producers – photosynthesis • Heterotrophs – consumers – cellular respiration

  3. Harvesting the Energy in Food

  4. Main Forms of Energy • Energy > ability to perform work • Kinetic > Energy of motion > Thermal energy • Potential > Energy stored due to an objects position or arrangement > Chemical energy

  5. Putting Chemical Energy to Work 75% 2525 25% 60% 40%

  6. Calorie – A Unit of Energy • Calorie > the amount of energy required to raise the temperature of 1 gram (g) of water by 1 degree Celsius (°C) • 1,000 calories = 1 kilocalorie (kcal) • We burn calories for work through the process of cellular respiration

  7. ATP = Adenosine triphosphate • ATP = Energy “currency” for cell • ATP provides energy for the cell to do three types of work: • Chemical work = building large molecules • Mechanical work = muscle contraction • Transport work = getting ions across cell membrane

  8. ATP Cycle

  9. When sugar is burned, oxygen atoms pull electrons from carbon and hydrogen, forming new chemical bonds.

  10. Online activity 7.2 • In a Venn diagram write the similarities and differences between the marshmallow being consumed by the fire and by Tom

  11. Electron Transport Chain An electron transport chain is like a staircase, as electrons move down each step in the chain, a small amount of energy is released.

  12. Overall Equation for Cellular Respiration

  13. Overview of what happens during cellular respiration and where (p 148)

  14. Stages of Cellular respiration (p 152)

  15. Cell Respiration Table Total ATP = 38

  16. Where does oxygen go when you breath ? What is in the muscle cell that uses the oxygen?

  17. Fermentation is an anaerobic process • Fermentation in human muscle cells • ATP is produced in the absence of oxygen • The byproduct of fermentation is lactic acid • Fermentation in microorganisms • Yeasts are capable of cellular respiration and fermentation • The byproduct of fermentation is alcohol • Some other fungi and bacteria produce lactic acid (use in the production of cheese and yogurt)

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