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Getting Energy From Food

Getting Energy From Food. All organisms must break down food molecules to release the stored energy. 2 Ways to Break Down Food. 1. Cellular Respiration (uses oxygen) Breathing supplies your cells with the oxygen they need to perform cellular respiration.

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Getting Energy From Food

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  1. Getting Energy From Food • All organisms must break down food molecules to release the stored energy.

  2. 2 Ways to Break Down Food • 1. Cellular Respiration (uses oxygen) • Breathing supplies your cells with the oxygen they need to perform cellular respiration. • It also rids your body of carbon dioxide, which is a waste product of cellular respiration.

  3. Food is broken down into CO2 and H2O, and energy is released. • Some energy is stored as ATP. • Most energy is released in the form of heat. (homeostasis – maintaining a stable internal environment) • Cellular respiration takes place in the mitochondria.

  4. Chemical Equation for Cellular Respiration • C6H12O6 + 6O2 6CO2 + 6H2O + energy • (ATP) • Glucose + Oxygen  Carbon Dioxide + Water + Energy (ATP)

  5. 2. Fermentation (Does not use 02) • Leads to the production of a small amount of ATP and products from the partial breakdown of glucose.

  6. 2 Types of Fermentation • A) Occurs in muscles; produces lactic acid, which contributes to muscle fatigue after strenuous activity. Also occurs in some types of bacteria. • B) Occurs in certain types of bacteria and in yeast. Yeast cells make carbon dioxide and alcohol during fermentation of sugar. Carbon dioxide causes bubbles to form in bread.

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