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Cellular Respiration

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Title: Cellular Respiration Author: Anne Royston Last modified by: Admin Created Date: 10/23/2006 10:20:22 PM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

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Title: Cellular Respiration


1
Cellular Respiration
  • Chapter 9

2
2 Types of Respiration
  • Aerobic-
  • requires oxygen
  • Anaerobic-
  • does not require oxygen (less efficient)

3
Aerobic Cellular Respiration
  • Process in which a glucose molecule is broken
    down and the energy it contains is released.

4
3 Stages to Cellular Respiration
  1. Glycolysis- glucose is partially broken down to
    pyruvate (yields 2 ATP) in cytoplasm
  2. Krebs Cycle -pyruvate is completely broken down
    to CO2 and H2O (yields 2 ATP)

5
  • 3. Electron Transport System- occurs in the
    inner membranes of the mitochondria and produces
    34 ATP

6
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7
  • Therefore 1 molecule of glucose yields 38 ATP
  • in Aerobic Cellular Respiration

8
Chemical Equation for Cellular Respiration
  • C6H12O6 6O2 ? 6CO2 6 H2O 38 ATP

9
Anaerobic Respiration- Fermentation
  • Lactic Acid Fermentation-Muscle cells can use
    this for a short time to make ATP in the absence
    of necessary levels of oxygen. This is the reason
    muscles get sore after a workout.

10
  • Alcoholic Fermentationyeast rely on this type of
    respiration
  • Wine and beer contain ethanol made during
    alcoholic fermentation by yeast

11
  • Both of these forms of anaerobic respiration only
    yield 2 ATP per molecule of glucose, so this type
    of respiration is very inefficient.
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