CELLULAR RESPIRATION

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CELLULAR RESPIRATION

• Chapter 9

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Cellular Respiration

• The process that releases energy (ATP) by
  breaking down food molecules in the presence of
  oxygen

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Mitochondria

• Found?
• Plant Animal Cells
• Where respiration takes place
• Just aerobic parts

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Aerobic Vs. Anaerobic Respiration

• Aerobic presence of O2
• Respiration
• Anaerobic absence of O2
• Fermentation

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Pathway of Cellular Respiration

• Glycolysis (Cytoplasm)
• Krebs Cycle (Mito.)
• Electron Transport Chain (Mito.)

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Glycolysis

• Glukus sweet
• Lysis loosening
• Occurs in Cytoplasm
• Breaking one glucose down into 2 pyruvic acids(3
  Carbon) 2 ATP (net)

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After Glycolysis

• Anaerobic Fermentation
• Aerobic Cellular Respiration

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Fermentation

• Fermentation will make energy without O2
• Two types
• Alcoholic
• Lactic acid

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Alcoholic

• Yeast other microorganisms
• CO2 causes bread to rise

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Lactic Acid

• Animal muscles
• Happens during vigorous exercise
• Builds up in muscles causing cramps

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Krebs Cycle

• Follows glycolysis
• Needs oxygen
• Respiration
• Occurs in mitochondria
• Breaks down products of glycolysis into carbon
  dioxide
• Releasing energy to make electron carriers and ATP

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Krebs Cycle
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Electron Transport Chain

• Inner membrane of mitochondria
• Electrons move to produce energy

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ETC

• Makes ATP 2-3 per electron carrier
• Oxygen is used as the final electron acceptor
  (H)
• Forms water

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Mitochondrial membrane
NADH enters and releases an H and an electron.
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Mitochondrial membrane
NADH enters and releases an H and an electron.
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Mitochondrial membrane
The electron travels to the next protein while
simultaneously sending H across the membrane
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Mitochondrial membrane
The electron is used to form water. The H then
are pumped back into the mitochondria.
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Mitochondrial membrane
This allows ATP to be made each time a H enters
back in.
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Totals

• Glycolysis
• Net 2 ATP
• Krebs
• 2 ATP
• ETC
• Electron carriers
• 32 ATP
• Total 36 ATP

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Photosynthesis Vs Cellular Respiration
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