1. Cellular Respiration

2. An Alternate Route…
When you exercise for long amounts of time your muscles need to make ATP
When you sprint, your lungs and blood cant produce oxygen fast enough to meet your muscles’ needs for ATP
Sooo … muscles will use a process called fermentation
Makes ATP w/o using O2

3. Fermentation Makes ATP entirely from glycolysis
Produces a waste product called lactic acid
Buildup of lactic acid = muscle fatigue
Your body consumes oxygen (heavily breathing) to convert lactic acid back to pyruvic acid

4. 2 Types of Fermentation
Ethyl Alcohol Fermentation - occurs in plants, bacteria and fungi
pyruvic acid + H  Ethyl Alcohol + CO2
*Bread rising
Lactic Acid Fermentation – occurs in animal muscle cells
pyruvic acid + H  Lactic Acid

5. Lactic Acid Fermentation Ethyl Alcohol Fermentation
Glycolysis
2 ATP
Anaerobic – without oxygen
Fermentation
Aerobic – with oxygen
Respiration
Lactic Acid Fermentation
Animals
36 ATP
2 ATP
2 ATP
Ethyl Alcohol Fermentation
Plants
NET = 38 ATP
With oxygen
NET = 4 ATP
Without oxygen

6. The many uses of fermentation…