3. ATP synthesis then occurs as H+ ions flow back into the mitochondrial matrix through a special type of H+ channel in the inner membrane. Note: Both the Krebs Cycle and The ETC require oxygen and therefore are referred to as Aerobic Cellular Respiration. Glycolysis doesn’t require oxygen and therefore referred to as Anaerobic Cellular Respiration.
Note: RBCs lack mitochondria and therefore can only produce ATP by Glycolysis.
***Summary of Cellular Respiration***
Key: 1 NADH + H = 3 ATP, 1 FADH 2 = 2 ATP
Therefore: From 1 Glucose molecule…….
1. Glycolysis:
2 Pyruvic Acid
2 ATP
2 NADH+H+ ( 6 ATP in ETC )
2. Formation of 2 Acetyl CoA 2 NADH+H+ ( 6 ATP in ETC )
3. Krebs Cycle
2 ATP
6 NADH+H+ ( 18 ATP in ETC )
2 FADH 2 ( 4 ATP in ETC )
4. ETC
36 ATP (or 38 depending on the source)
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