11Antioxidants09PDF

11Antioxidants09PDF - Key Concepts Covered by Exam...

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Unformatted text preview: Key Concepts Covered by Exam Antioxidants Know, and understand, during what processes in the human body reactive oxygen is formed Recognize examples of environmental oxidants Know what general part of the diet provides antioxidants, and understand how these influence disease risk Normally, electrons loaded onto oxygen to form water: The human body forms reactive oxygen with every breath we take: 5-10% of electron transport in mitochondrial respiration leads to formation of reactive oxygen. Sometimes, O 2 gets away with only 1 electron as reactive oxygen Protein complex of electron carriers H + H + H + Cyt c Q V FADH 2 FAD NAD + NADH (carrying electrons from food) Electron transport chain & pumping of protons 2 H + + 1 / 2 O 2 H 2 O ADP + P i H + H + ATP synthase ATP 2 1 Intermembrane space Mitochondrial matrix Inner membrane Fig. 9.16 ATP synthesis via H + flow Reactive Oxygen and Antioxidants Other oxidants come from environment Smoking excess UV radiation ionizing radiation heavy metals asbestos silica detoxification of alcohol and legal/illegal drugs Other oxidants come from environment Smoking excess UV radiation ionizing radiation...
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11Antioxidants09PDF - Key Concepts Covered by Exam...

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