NTN 230 Final Exam Study Guide Questions and Correct Answers/ Latest Update / Already Graded

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NTN 230 Final Exam Study Guide
Questions and Correct Answers/ Latest
Update / Already Graded
antioxidants


Ans: a compound that has the ability to prevent or rpair the damage

caused by oxidization




free radicals


Ans: highly unstable atom with an upaired electron in its outer shell




Why are free radicals bad?


Ans: can destabilize other molecules and damage cells




nutrients as antioxidants


Ans: part of our protective ensyme systems (E, C, A, Beta-cerotene)




Antioxidant enzyme systems

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Ans: stabilize free radicals and repair the damage




superoxide dismutase (requires copper, zinc, and manganese)


Ans: converts FR to less damaging substanes such as hydrogen peroxide




Glutathione peridoxase (requires riboflavin, and selenium)


Ans: removed hydrogen peroxide from the body and stops the

production of FR in lipids




Catalase (requires iron)


Ans: removes hydrogen peroxide from the body by converting it to water

and oxygen




Antioxidants and disease


Ans: Cancer, CVD, Low grade inflammation




Vitamin E

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Ans: fat soluble, incorporated into Chylomicrons and VLDL




most active form of E


Ans: alpha tocopherol




Functions of Vit E


Ans: antioxidant protection, PUFA, cell membrane




food sources of E


Ans: cereal, marinara sauce, avocado, peanut butter




RDA of E


Ans: 15mg/day




toxicity of E