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ATP and Cellular Respiration

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Presentation on theme: "ATP and Cellular Respiration"— Presentation transcript:

1 ATP and Cellular Respiration
Breakdown of a Glucose Molecule to make ATP so our cells can perform chemical reactions

Heterotrophs – organisms that cannot make their own energy and need to consume other organisms to get energy (consumers) All animals, fungi, and some bacteria are heterotrophs

3 Why Make ATP? Referred to as energy currency of the cell
Provide energy for chemical reactions to take place in our body (cells)

4 Mitochondria Site of cellular respiration (where ATP is made)
Conists of Outer membrane Inner membrane Matrix Cristae

5 Cellular Respiration Breakdown
Glycolysis Located in cytoplasm of cell Krebs Cycle Located in Mitochondrial Matrix Electron Transport Chain Located in mitochondrial cristae

6 Glycolysis Breakdown of a single Glucose molecule Reactants Products
2 pyruvate molecules 2 ATP molecules Energy 2 NADH molecules Electron carriers

7 Pyruvate Pyruvate can take 2 paths from this point:
Aerobic Respiration (with oxygen) Pyruvate moves into mitochondria and ATP is made via Krebs Cycle and Electron Transport Chain Anaerobic Respiration (without oxygen) Pyruvate stays in cytoplasm and is converted into lactic acid -Lactic Acid Fermentation

8 Aerobic Respiration Krebs Cycle Reactants Products
Conversion of 2 pyruvate molecules Reactants 2 pyruvate molecules Products 4 CO₂ molecules 2 ATP molecules Energy 6 NADH molecules Electron carriers 2 FADH₂

9 Aerobic Respiration Electron Transport Chain Reactants Products
Electrons are transferred to proteins from NADH and FADH₂ Electrons are passed from one protein to the next Final electron acceptor is Oxygen (O₂) Reactants NADH FADH₂ Products 34 ATP molecules Energy Water (H₂O)

10 Anaerobic Respiration
Lactic Acid Fermentation Conversion of 2 molecules of pyruvate into lactic acid when oxygen is not present Happens during vigorous muscle exercise Liver converts lactic acid back into glucose

11 Anaerobic Respiration
Alcohol Fermentation Does not occur in humans Occurs in yeast when oxygen is not available Facultative anaerobes Conversion of 2 molecules of pyruvate into ethanol

12 Photosynthesis and Cellular Respiration

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