Cell Respiration.

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Cellular Respiration Energy For Cells.

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Presentation transcript:

Cell Respiration

How do we get energy from food? Cell Respiration – mitochondria break down food to make ATP (energy) Formula: C6H12O6 + 6O2 -----> 6CO2 + 6H20 + energy (heat and ATP) 1 glucose + 6 oxygen  6 carbon dioxide + 6 water + energy

3 Stages of Cell Respiration

2. 3. 1.

3 Stages of Cell Respiration: Glycolysis Anaerobic – no oxygen required Occurs in the cytoplasm Glucose  2 pyruvic acids* Net ATP production = 2

3 Stages of Cell Respiration: 2. Citric Acid Cycle (a.k.a. Krebs Cycle) Occurs in mitochondria, requires oxygen (aerobic) Net ATP production = 2

3 Stages of Cell Respiration: 3. Electron Transport Chain Occurs in mitochondria, requires oxygen (aerobic) Net ATP = 32

Electron Transport Chain Animation

* If oxygen is not available, cell undergoes fermentation after glycolysis.

2 Types of Fermentation

2 Types of Fermentation: 1. Lactic Acid – lactic acid builds up in muscles when they do no get enough oxygen  muscle fatigue

Other Products?

2 Types of Fermentation: 2. Alcoholic – yeast cells produce CO2 and ethyl alcohol (a.k.a. ethanol).

Other Products?

ANAEROBIC CONDITIONS: Aerobic vs. Anaerobic AEROBIC CONDITIONS: (oxygen present) Cell Respiration 36 ATP ANAEROBIC CONDITIONS: (no oxygen) Fermentation 2 ATP Which is more efficient (which produces MORE energy)?