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Cellular Respiration

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Title: Cellular Respiration Created Date: 10/24/2005 3:59:03 AM Document presentation format: On-screen Show (4:3) Other titles: Verdana Arial Wingdings Calibri Times ... – PowerPoint PPT presentation

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Title: Cellular Respiration


1
Cellular Respiration
2
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?

3
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

4
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.

5
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.

6
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.

7
Electron Transport Chain
  • The electron transport chain uses the high-energy
    electrons from the Krebs Cycle to convert ADP to
    ATP.
  • Total ATP 32.

8
Totals
  • Gycolysis 2 ATP
  • Krebs Cycle 2 ATP
  • Electron Transport Chain 32 ATP
  • Total 36 ATP

9
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.

10
Comparing Photosynthesis Respiration
Photosynthesis Cellular Respiration
Function Energy Storage Energy Release
Location Chloroplasts Mitochondria
Reactants CO2 and H2O C6H12O6 and O2
Products C6H12O6 and O2 CO2 and H2O
Equation 6CO2 6H2O ? C6H12O6 6O2 C6H12O6 6O2? 6CO2 6H2O
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