Aerobic Respiration

Aerobic Respiration
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  • 1
  • Hey, guys! Since we've got a game coming up soon, I thought it would be good to talk about something important in the sport of soccer. Get ready to learn about aerobic respiration!
  • 2
  • Glucose
  • When I run, glycolysis starts working in the cytoplasm of a cell to give me energy. This is when glucose is broken down into pyruvic acid without using any oxygen.
  • Net Gain: 2 ATP are put into glycolysis to give energy, and 4 come out, resulting in a gain of 2.
  • Pyruvate
  • Pyruvate
  • 3
  • As I keep running, the pyruvic acid moves to the Krebs Cycle. It is converted into Acetyl CoA with the help of the enzyme Coenzyme A, and the Acetyl CoA is how the Krebs Cycle gets started.
  • Moving to the matrix of the mitochondria...
  • Pyruvic Acid
  • NADH
  • Coenzyme A-Pyruvic acid substrate
  • CO2
  • During this conversion of Pyruvate to Acetyl CoA, CO2 is produced and NADH is formed.
  • Acetyl CoA
  • In the Krebs Cycle, Acetyl CoA and a 4-carbon molecule are joined by a coenzyme to make citric acid.
  • 4
  • Acetyl CoA
  • C
  • C
  • C
  • C
  • Citric Acid
  • Coenzyme
  • NADH
  • CO2
  • Net Gain: I get 2 more ATP from this stage, giving me more energy to keep running.
  • CO2 is released from the citric acid, creating more NADH to ultimately be used in the Electron Transport Chain. The citric acid, in turn, is broken down into the 4-carbon molecule.
  • NADH and FADH2 donate protons and electrons to the ETC. Protons are pumped to the inner membrane space while electrons go through the chain. At the end of the chain, the electrons find oxygen and make water, while the protons go through ATP synthase to make ATP.
  • The ETC (in the intermembrane) is where I get most of my energy to keep running during warm-ups and games without falling over from exhaustion.
  • 5
  • NADH
  • H+
  • 
  • FADH2
  • e-
  • H+
  • 
  • e-
  • 
  • H+
  • 
  • e-
  • 
  • H+
  • e-
  • Net Gain: 34 ATP molecules are made in the ETC.
  • H+
  • 
  • H+
  • ATP
  • 6
  • Well, now that we know this, we can learn how to prepare for games without getting sore! As long as we get enough oxygen to our muscles, then we will be able to use the aerobic pathways instead of anaerobic pathways!
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