1. (Aerobic Respiration)
Cell Respiration
(Aerobic Respiration)

2. How do we get energy from food?
Cell Respiration – mitochondria break down food to make ATP (energy)
Formula:
1 glucose + 6 oxygen  6 carbon dioxide + 6 water + energy
C6H12O6 + 6O > 6CO2 + 6H20 + energy (36ATP)

3. 3 Steps of Cell Respiration
Glycolysis – in the cytoplasm
no oxygen required
sugar broken into 2 pieces
2 ATP made
Citric Acid Cycle –in the mitochondria
oxygen required
sugar completely broken down
CO2 is produced

4. 3 Steps of Cell Respiration
3. Electron Transport Chain – on the mitochondrial membrane
oxygen required
32 ATP made
Oxygen picks up all the pieces of the hydrogens that have been bouncing around making ATP

5. Things that increase cell respiration
More food (glucose)
More oxygen
More mitochondria
More folds in the mitochondria (more surface area)

6. If oxygen is not available, cell undergoes fermentation after glycolysis.
Fermentation does not make ATP (so only the 2 ATP in glycolysis is made) but something needs to be done with the broken up sugar

7. 2 Types of Fermentation:
1. Alcoholic – yeast cells produce CO2 and ethyl alcohol (a.k.a. ethanol).

8. Products that use alcoholic fermentation
Beer
Wine
Breads

9. 2 Types of Fermentation:
2. Lactic Acid – in humans, lactic acid builds up in muscles when they do not get enough oxygen  muscle fatigue

10. Products made thanks to lactic acid fermentation in bacteria
Yogurt
Cheese
Sauerkraut

11. What process is shown here?
What kind of fermentation?
Aerobic or anaerobic?
What are the products?

12. ANAEROBIC CONDITIONS:
Aerobic vs. Anaerobic
AEROBIC CONDITIONS:
(oxygen present)
Cell Respiration
36 ATP
ANAEROBIC CONDITIONS:
(no oxygen)
Fermentation
2 ATP
Which is more efficient (which produces MORE energy)?
Why do aerobic organisms out number anaerobic even though anaerobic existed first?