Interest Grabber

2. Interest Grabber Section 9-1 • Feel the Burn • Do you like to run, bike, or swim? These all are good ways to exercise. When you exercise, your body uses oxygen to get energy from glucose,a six-carbon sugar. 1. How does your body feel at the start of exercise, such as a long, slowrun? How do you feel 1 minute into the run; 10 minutes into the run? 2. What do you think is happening in your cells to cause the changesin how you feel? 3. Think about running as fast as you can for 100 meters. Could youkeep up this pace for a much longer distance? Explain your answer.

3. OVERALL EQUATION • C6H12O6 + 6O2 6CO2 + 6H2O + energy(ATP) • Glucose + Oxygen  Carbon Dioxide + Water + ATP (Adenosine triphosphate)

4. Section Outline Section 9-1 • 9–1 Chemical Pathways A. Chemical Energy and Food B. Overview of Cellular Respiration C. Glycolysis 1. ATP Production 2. NADH Production D. Fermentation 1. Alcoholic Fermentation 2. Lactic Acid Fermentation

5. Section Outline Section 9-2 • 9–2 The Krebs Cycle and Electron Transport A. The Krebs Cycle B. Electron Transport C. The Totals D. Energy and Exercise 1. Quick Energy 2. Long-Term Energy E. Comparing Photosynthesis and Cellular Respiration

6. ORGANELLE OF FOCUS

7. Figure 9–2 Cellular Respiration: An Overview Section 9-1 Mitochondrion Electrons carried in NADH Electrons carried in NADH and FADH2 Pyruvic acid Glucose Electron Transport Chain Krebs Cycle Glycolysis Mitochondrion Cytoplasm

8. Chemical Pathways Section 9-1 Glucose Krebs cycle Electrontransport Glycolysis Alcohol or lactic acid Fermentation (without oxygen)

9. Flowchart Section 9-2 Cellular Respiration Glucose(C6H1206) + Oxygen(02) Glycolysis KrebsCycle ElectronTransportChain Carbon Dioxide (CO2) + Water (H2O)

10. Figure 9–3 Glycolysis Section 9-1 Glucose 2 Pyruvic acid To the electron transport chain

11. Figure 9–3 Glycolysis Section 9-1 Glucose 2 Pyruvic acid To the electron transport chain

12. Figure 9–3 Glycolysis Section 9-1 Glucose 2 Pyruvic acid To the electron transport chain

13. Figure 9–6 The Krebs Cycle Section 9-2 Citric Acid Production Mitochondrion

14. Figure 9–6 The Krebs Cycle Section 9-2 Citric Acid Production Mitochondrion

15. CHECK FOR UNDERSTANDING • BEFORE WE GO ANY FURTHER – SEE HOW WELL YOU UNDERSTAND THE FIRST TWO STEPS IN CELLULAR RESPIRATION: • Answer the questions in your notes, use your textbook Ch9.

16. Figure 9–7 Electron Transport Chain Section 9-2 Electron Transport Hydrogen Ion Movement Channel Mitochondrion Intermembrane Space ATP synthase Inner Membrane Matrix ATP Production

17. Summary Chart Total ATPS________

18. SUMMARY

19. WHAT IF THERE ISN’T ANY OXYGEN? • CELLUAR RESPIRATION: Anaerobic (fermentation) • *yeast cells = alcohol production • *muscle cells = lactic acid production

20. Figure 9–4 Lactic Acid Fermentation Section 9-1 Lactic acid Glucose Pyruvic acid

21. Figure 9–4 Lactic Acid Fermentation Section 9-1 Lactic acid Glucose Pyruvic acid

22. Figure 9–4 Lactic Acid Fermentation Section 9-1 Lactic acid Glucose Pyruvic acid

23. Pros and Cons of Lactic Acid Fermentation • Pros – your muscle will keep working even without sufficient oxygen

24. Cons – you feel it, lactic acid causes sore muscles and cramping • Your body will get rid of lactic acid – it diffuses into blood and goes to liver where it is converted back to pyruvic acid – ready for O2 LIVER

25. RECAP6C6H12O6 + 6O2 6CO2 + 6H2O + energy (ATP) • GLUCOSE becomes… • CO2 • Oxygen is needed… • to accept the electrons at the end of ETC • CO2 goes… • into blood, lungs, exhaled • Water is produced when… • O2 collects enough e- and H+ to become water • ATP is produced… • in glycolysis, Kreb Cycle and mainly in ETC due to chemiosmosis

26. Pyruvic acid is made … • at the end of glycolysis (3C) • NADH and FADH2 carry … • Electrons and H+ to the ETC • Protons (H+) build up in the …due to… • Intermembrane space, ETC pushing them out • ATP synthase allows H+ to … and … • Back into the matrix, produces ATPs • If no oxygen, yeast produce… • ethanol • If no oxygen, muscle cells produce… • Lactic acid

27. The ETC produces... • 34 ATPs • In aerobic respiration, Pyruvic acid is converted to… • Acetyl CoA • The molecule that must be recycled in the Kreb cycle is… • Oxaloacetic acid • The break down of one glucose gives… • 38 total ATP

28. Autotrophs… • Make their own food/chemical energy • Heterotrophs… • Must eat other things to obtain chemical energy • Aerobic respiration requires… • Oxygen

29. VIDEO LINKS • FROM FOOD TO ATP • Cellular Respiration Overview

30. Video Contents Video Contents • Click a hyperlink to choose a video. • Aerobic Respiration • Glycolysis • Krebs Cycle, Part 1 • Krebs Cycle, Part 2 • Electron Transport Chain, Part 1 • Electron Transport Chain, Part 2

31. Video 1 Video 1 • Click the image to play the video segment. Aerobic Respiration

32. Video 2 Video 2 • Click the image to play the video segment. Glycolysis

33. Video 3 Video 3 • Click the image to play the video segment. Krebs Cycle, Part 1

34. Video 4 Video 4 • Click the image to play the video segment. Krebs Cycle, Part 2

35. Video 5 Video 5 • Click the image to play the video segment. Electron Transport Chain, Part 1

36. Video 6 Video 6 • Click the image to play the video segment. Electron Transport Chain, Part 2

37. Internet Go Online • Links from the authors on Creatine • Share kimchi lab data • Interactive test • For links on cellular respiration, go to www.SciLinks.org and enter the Web Code as follows: cbn-3091. • For links on the Krebs cycle, go to www.SciLinks.org and enter the Web Code as follows: cbn-3092.

38. End of Custom Shows • This slide is intentionally blank.