1. Cellular Respiration Notes

2. Pre-Quiz In what organelle does cellular respiration take place?
Chloroplast
Nucleus
Mitochondria

3. Pre-Quiz
Does aerobic respiration require oxygen?

4. Pre-Quiz Which of the following is not part of cellular respiration?
Calvin Cycle
glycolysis
modification of pyruvate
electron transport chain

5. Pre-quiz
How many ATP are made during aerobic respiration? 2 8 32 36

6. Pre-Quiz What causes muscle fatigue? Aerobic respiration
Lactic acid fermentation
Alcoholic fermentation

7. Cellular Respiration
The process by which mitochondria break down food molecules to produce ENERGY (ATP)!

8. Aerobic Respiration (with Oxygen)
Exists in 4 Stages
Glycolysis
Modification of Pyruvate
Citric Acid Cycle / Krebs Cycle
Electron Transport Chain

9. Glycolysis Breaking down glucose Occurs in the cytoplasm of the cell.
chemical reactions that break down glucose in to 2 pyruvates.
2 ATP are used and 4 ATP are produced = net gain of 2 ATP.

10. Modification of Pyruvate
Pyruvate is changed into Acetyl Co-A
Occurs in the mitochondria
Products:
1 CO2
1 NADH which is an electron carrier.

11. Citric Acid Cycle / Krebs Cycle
1 Glucose = 2 turns of the cycle.
Products:
2 More CO2
More electron carriers (3 NADH & 1 FADH2)
1 ATP produced per turn.

12. Kreb’s Cycle

13. Electron Transport Chain
Electron carriers pass electrons from protein to protein in the inner membrane of the mitochondria.
This forms ATP!
The electron is accepted by oxygen and water is produced.
This chain produces 32 ATP.

14. ETC (Electron Transport Chain)

15. ATP Synthesis

16. Overall Equation for Cellular Respiration
C6H12O6 + 6O2 6CO2 + 6H2O + energy

17. Overall Energy Output (for aerobic respiration):
2 ATP from Glycolysis
2 ATP from Krebs Cycle
32 ATP from Electron Transport Chain
36 ATP Total
Animation

18. Anaerobic Respiration (with out Oxygen)
Lactic Acid Fermentation
used by animals and some plants (cells) when the electron transport chain backs up due to lack of oxygen.
produces a byproduct known as lactic acid (toxic to cells)
Results in muscle fatigue.
Only get 2 ATP from this process.

19. Anaerobic Respiration (with out Oxygen)
Alcoholic Fermentation
used by yeast as well as others to produce CO2 and ethyl alcohol.