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Cards In This Set
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What are Antioxidants?
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Chemicals that protect cells from damage from oxidation.
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List 5 examples of Antioxidants
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1. Vitamin E2. Vitamin C3. Beta-carotene4. Vitamin A5. Selenium
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What is an atom?
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The smallest unit of matter, composed of nuclues and electrons.
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What is oxidation?
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The loss of electrons from a molecule
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What is reduction?
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The gain of electrons by a molecule
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Stable atoms contain _____ number of paired electrons.
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Even
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What is a free radical?
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An atom that has lost an electron and is left with an unpaired electron. (highly reactive)
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How are free radicals produced?
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1. Oxidation2. Pollution3. UV light4. Toxic substances
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List the four thingd free radicals damage
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1. Cell membranes2. Low density lipoprotein3. Protein in the cell4. Genetic material (DNA)
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How do antioxidants function\?
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1. Some vitamins donate their electrons to free radicals to stablize them2. Some minerals act with complex enzyme systems to kill free radicals.
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What are the functions of vitamin E?
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1. Primary role as an antioxidant2. Protects Poly unsaturates fatty acids3. Protects low density lipoproteins.
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What are the sources of vitamin E?
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Vegetable oils, nuts, seeds, soy beans, broccoli
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What are the functions of vitamin C?
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1. Antioxidant2. synthesis of collagen3. prevents scurvy4. enhances immune system.
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What is the RDA for vitamin C?
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90 mg for men, 75mg for womensmokers need 35mg extra
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What are the sources of vitamin C?
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Fresh fruitsvegetables
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