1. Chapter 9
CELLULAR RESPIRATION

2. Cellular Respiration
The process that releases energy (ATP) by breaking down food molecules in the presence of oxygen

3. Mitochondria Found? Where respiration takes place Plant & Animal Cells
Just aerobic parts

4. Aerobic Vs. Anaerobic Respiration
Aerobic = presence of O2
Respiration
36 ATP per glucose
Anaerobic = absence of O2
Fermentation
2 ATP per glucose

5. Pathway of Cellular Respiration
Glycolysis (Cytoplasm)
Krebs Cycle (Mito.)
Electron Transport Chain (Mito.)

6. Glycolysis “Glukus” = sweet “Lysis” = loosening Occurs in Cytoplasm
Breaking one glucose down into 2 pyruvic acids(3 Carbon) & 2 ATP (net)

7. After Glycolysis Anaerobic = Fermentation
Aerobic = Cellular Respiration

8. Fermentation Fermentation will make energy without O2 Two types
Alcoholic
Lactic acid

9. Alcoholic
Yeast & other microorganisms
CO2 causes bread to rise

10. Lactic Acid Animal muscles Happens during vigorous exercise
Builds up in muscles causing cramps

11. Krebs Cycle Follows glycolysis Needs oxygen Occurs in mitochondria
Respiration
Occurs in mitochondria
Breaks down products of glycolysis into carbon dioxide
Releasing energy to make electron carriers and ATP

12. Krebs Cycle

13. Electron Transport Chain
Inner membrane of mitochondria
Electrons move to produce energy

14. ETC: Makes ATP – 2-3 per electron carrier
Oxygen is used as the final electron acceptor (H+)
Forms water

15. NADH enters and releases an H+ and an electron.
Mitochondrial membrane
NADH
NADH enters and releases an H+ and an electron.

16. NADH enters and releases an H+ and an electron.
Mitochondrial membrane e-
NAD+
NADH enters and releases an H+ and an electron.

17. Mitochondrial membrane
The electron travels to the next protein while simultaneously sending H+ across the membrane

18. Mitochondrial membrane
ADP H+ H+ H+ P
The electron is used to form water. The H+ then are pumped back into the mitochondria.

19. This allows ATP to be made each time a H+ enters back in.
Mitochondrial membrane H+ H+
ATP H+ H+ H+ H+
This allows ATP to be made each time a H+ enters back in.

20. Totals Glycolysis Krebs ETC **Total = 36 ATP Net 2 ATP 2 ATP
Electron carriers =
32 ATP
**Total = 36 ATP

22. Photosynthesis Vs Cellular Respiration