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When you are hungry, how do you feel???

When you are hungry, how do you feel???. Cellular Respiration. A – Chap. 9 Page 220. C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O + ATP. = The process where the chemical energy of "food" molecules is released and changed to ATP. ATP powers almost ALL cellular and body activities.

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When you are hungry, how do you feel???

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  1. When you are hungry, how do you feel???

  2. Cellular Respiration A – Chap. 9 Page 220 • C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP

  3. = The process where the chemical energy of "food" molecules is released and changed to ATP. ATP powers almost ALL cellular and body activities. Cellular Respiration

  4. Where does it happen? Mitochondria How does it happen? 3 Steps . . .

  5. 3. The ELECTRON TRANSPORT CHAIN (ETC) 3 Steps in C.R. 1. GLYCOLYSIS 2. The KREBS CYCLE!

  6. 1. Glycolysis --Takes place in the cytoplasm of cells --Breaks glucose (6-carbon) into two smaller compounds of Pyruvic Acid (3-carbon) and produces 2 ATP 1 glucose 2 pyruvic acid molecules

  7. 2. The Kreb’s Cycle If OXYGEN is present (aerobic) . . .then . . . --Takes place in mitochondria matrix --In this cycle, 3-carbon compound (pyruvic acid) and Oxygen are converted to CO2 , 2 ATP, and lots of high energy electrons

  8. Chemically, this is how it all goes down. Image taken from www.sp.uconn.edu

  9. Takes place in inner membrane of mitochondria High Energy electrons (from Krebs) are passed through a chain producing LOTS + LOTS + LOTS + LOTS of ATP (34) 3. Electron Transport Chain

  10. Aerobic Respiration Cells must contain GLUCOSE, OXYGEN, and ENZYMES... Summary ...To make ATP, CO2, H2O

  11. What if after glycolysis, there is NO oxygen???? Anaerobic conditions lead to . . . Fermentation 1. Alcoholic 2. Lactic Acid ***No more ATP produced after glycolysis

  12. Glucose Summary Glycolysis (Net) 2 ATP Without O2 With O2 Pyruvate Fermentation Kreb’s Cycle 2 ATP Alcoholic ETC 34 ATP Lactate Ethanol & CO2 Aerobic Respiration Anaerobic Processes (Produces the greatest amount of ATP!) (Cells make a limited # of ATP)

  13. Summary

  14. SummarizingCellular Respiration C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP

  15. Photosynthesis and Cellular Respiration “Cycle” Products of one become reactants of the other!

  16. Comparison of Photosynthesis vs. Cellular Respiration

  17. How much energy do we make? • In Cellular Respiration • Anaerobic • Glycolysis- 2 ATP • Fermentation- 0 ATP • Total- 2ATP • Aerobic • Glycolysis- 2 ATP • Krebs Cycle- 2 ATP • ETC- 34 ATP • Total- 38 ATP

  18. How do WE use Cellular Respiration? • Quick Energy • Enough ATP to last about 50 meters in a race. • Lactic- Acid Fermentation takes over to produce energy • Produce energy for about 90 seconds. • Long-Term Energy • Exercise longer than 90 seconds • Extra energy stored as carbohydrate glycogen for 15-20 minutes of energy • Longer exercise body breaks down other stored molecules- mainly lipids.

  19. VIDEO of CELLULAR RESPIRATION • http://www.youtube.com/watch?v=fvgpf51ScuI

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