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What do wood, a marshmallow and gasoline all have in common?

What do wood, a marshmallow and gasoline all have in common? . They all have stored chemical energy that can be used for energy!!!! . CELLULAR RESPIRATION. C 6 H 12 0 6 + 6O 2  6H 2 0 + 6 C0 2 + 38ATP . 38 ATP for one glucose - CR: 39 % efficient - Car: 25% efficient .

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What do wood, a marshmallow and gasoline all have in common?

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  1. What do wood, a marshmallow and gasoline all have in common?

  2. They all have stored chemical energy that can be used for energy!!!!

  3. CELLULAR RESPIRATION C6H1206 + 6O2 6H20 + 6 C02 + 38ATP 38 ATP for one glucose - CR: 39 % efficient - Car: 25% efficient

  4. How do we get energy from other foods?

  5. Obtaining Food • All organisms need food for energy and building materials

  6. Ultimate Source

  7. Energy Molecules ATP- Adenosine Triphosphate ( ENERGY CURRECNY) High Potential Energy ADP- Adenosine Diphosphate AMP- Adenosine Monophosphate

  8. Energy Cycle

  9. Energy Cycle

  10. Exergonic Reactions • Release energy • Spontaneous • Generate energy

  11. Endergonic Reactions • Input of energy

  12. Check Yourself • Are Photosynthesis and Cellular Respiration exergonic or endergonic reactions?

  13. Energy • Potential energy • energy of position, stored energy • Kinetic energy • energy of motion Sugars • Chemical Energy = • Potential Energy

  14. Entropy 2nd Law of Thermodynamics Entropy

  15. Cards Entropy Game • Cells are highly organized like the tower we built. • According to the Second Law of Thermodynamics, disorder (entropy) is always on the increase. (easy to break) • It takes work maintain order. • Cells need energy: to maintain their order to repair themselves to grow to reproduce

  16. Energy Molecules Redox Reactions- Reduction/Oxidation reactions LEO- Lose Electrons Oxidized GER- Gain Electrons Reduced

  17. Energy Molecules C6H1206 + 6O2 6H20 + 6 C02 + 38ATP H+ and 1 electron (e-) Glucose gets oxidized to CO2 LEO- lose electrons ( or Hydrogens) Oxygen gets reduced to H20 GER- gains electrons ( or Hydrogens)

  18. Check yourself! CH4 + 02 C02 + 2H20 Where does the fire come from?

  19. Chloroplast

  20. Types • Anaerobic Respiration ii. Aerobic Respiration

  21. Lactic Acid Fermentation

  22. Alcoholic Fermentation

  23. Aerobic Respiration Overview C6H12O6 + 6O2 6CO2 + 6H2O + 38 ATP Glucose Oxygen Carbon Dioxide Water Energy

  24. Stages of Aerobic Respiration 1) Glycolysis[cytoplasm]sugar is split in halves called pyruvate makes 2 ATP 2) Krebs Cycle / Citric Acid Cycle [in mitochondria]breaks down pyruvic acid into CO2 makes 2 ATP 3) Electron Transport Chain[membranes of mitochondria]H+ ions combine with oxygen, making ATP and water makes32-34 ATP

  25. Energy Molecules • What happens to the thing NAD+ and FAD takes the electrons from? • Gets oxidized • parts of the broken • down Glucose NAD+ and FAD • NAD+ is reduced  NADH • accepts 2 electrons and a H • (high energy electrons) • FAD is reduced FADH2 • accepts 2 electrons and 2 Hydrogens

  26. Glycolysis Overview • In the cytoplasm – O2 does not need to be present • Split sugar • Glucose 6 carbon sugar  split into two 3 carbon sugar (pyruvate) • 10 steps – 2 parts • Invest energy (spend 2 ATP) • 4 ATP formed • 2 NET ATP • 2 NADH formed • 2 Pyruvate and 2 H2O

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