9.1 Cellular Respiration Overview

Organisms get the energy they need from food

​Energy stored in food is expressed in units of calories

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1 calories = amount of energy needed to raise 1 gram of water 1 ^oC​

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Cells break down food gradually, capturing little bits of energy at key steps​

Cellular respiration is the process that releases energy from food in the presence of oxygen

6O₂ + C₆H₁₂O₆ ---> 6CO₂ + 6H₂O + energy

oxygen + glucose ---> carbon dioxide + water + energy​

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3 main steps:

Glycolysis, Krebs Cycle, and Electron Transport Chain​

2/3 of Cellular Respiration steps require oxygen

Aerobic - steps of cellular respiration that require oxygen

The Krebs Cycle and Electron Transport Chain

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Anaerobic - step of cellular respiration that do not rely on oxygen

Glycolysis​

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