Cellular Respiration Chapter 9

2 Types of Respiration Aerobic- requires oxygen Anaerobic- does not require oxygen (less efficient)

Aerobic Cellular Respiration Process in which a glucose molecule is broken down and the energy it contains is released.

3 Stages to Cellular Respiration Glycolysis- glucose is partially broken down to pyruvate (yields 2 ATP) in cytoplasm Krebs Cycle -pyruvate is completely broken down to CO2 and H2O (yields 2 ATP)

3. Electron Transport System- occurs in the inner membranes of the mitochondria and produces 34 ATP

Therefore: 1 molecule of glucose yields 38 ATP in Aerobic Cellular Respiration

Chemical Equation for Cellular Respiration C6H12O6 + 6O2  6CO2 + 6 H2O +38 ATP

Anaerobic Respiration- Fermentation Lactic Acid Fermentation-Muscle cells can use this for a short time to make ATP in the absence of necessary levels of oxygen. This is the reason muscles get sore after a workout.

Alcoholic Fermentation—yeast rely on this type of respiration Wine and beer contain ethanol made during alcoholic fermentation by yeast

Both of these forms of anaerobic respiration only yield 2 ATP per molecule of glucose, so this type of respiration is very inefficient.