Cellular Respiration

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Cellular Respiration
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Chemical Energy Food

• One gram of glucose 3811 calories
• 1 calorie amount of energy needed to heat 1
  gram of water 1 degree Celsius
• Food calories are measured in Calories where 1
  Calorie 1000 calories.
• What is the difference?

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Calories
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Cellular Respiration

• Cellular Respiration is the process that releases
  energy by breaking down food molecules in the
  presence of oxygen.
• 6O2 C6H12O6 ? 6CO2 6H2O Energy
• Oxygen Glucose ? Carbon Dioxide Water
  Energy

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Cellular Respiration
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Glycolysis

• Glycolysis is the process in which one molecule
  of glucose is broken in half, producing two
  molecules of pyruvic acid.
• 2 ATP needed to start reaction, 4 ATP are
  produced thus the net gain is 2 ATP.

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Fermentation

• Releases energy from glucose without the presence
  of oxygen.
• There are two types of fermentation alcoholic
  and lactic acid.
• Alcoholic fermentation is done by yeasts and some
  microorganisms. It produces alcohol Carbon
  Dioxide
• Lactic Acid is produced by muscles during rapid
  exercise when the body cannot supply enough
  oxygen.

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The Krebs Cycle

• During the Krebs Cycle, pyruvic acid is broken
  down into carbon dioxide in a series of
  energy-extracting reactions.
• Citric Acid is created in this cycle thus giving
  it the nickname Citric Acid cycle.
• Net ATP Production is 2 ATP.

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Electron Transport Chain

• The electron transport chain uses the high-energy
  electrons from the Krebs Cycle to convert ADP to
  ATP.
• Total ATP 32.

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Totals

• Gycolysis 2 ATP
• Krebs Cycle 2 ATP
• Electron Transport Chain 32 ATP
• Total 36 ATP

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From Food to ATP
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Energy Exercise

• Quick energy Lactic Acid fermentation is used
  to get quick energy and gives off lactic acid as
  a by product, thus the muscle pain.
• Long-Term Energy Use cellular respiration to
  produce energy. Exercising or activities that
  last for at least 15 to 20 minutes. Best form for
  weight control.

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The Oxygen Cycle
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Comparing Photosynthesis Respiration