nutrition study guide - Nutrition 130, Fall 2008. Exam # 3:...

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Nutrition 130, Fall 2008. Exam # 3: Study Guide NOTE: There will be no questions from the alcohol lecture. <Fat-soluble vitamins> 1. Why vitamins are important? Which vitamins (fat or water soluble vitamins) develop deficiency more quickly? 2. Differentiate between fat-soluble and water –soluble vitamins. soluble vitamins require bile for their absorption. The fat- soluble vitamins participate in numerous activities throughout the body, but excesses are stored primarily in the liver and adipose tissue. The body maintains blood concentrations by retrieving these vitamins from storage as needed. Water- soluble vitamins are B vitamins, thiamin, riboflavin, niacin, biotin, pantothenic acid, folate, and vitamin C. 3. Know the functions, storage site, storage form, deficiency symptoms, and toxicity symptoms of both fat soluble and water soluble vitamins. Fat- soluble vitamins travel through the lymphatic system within chylomicrons before entering the bloodstream, where many of them require protein carriers for transport. The fat- soluble vitamins participate in numerous body activities. The body maintains blood concentrations by retrieving these vitamins from storage as needed; thus people can eat less than their daily need for days, weeks, or even months or years without ill effects. Functions are free radical scavenger by donating election to oxidizing agent, protects cells from attack by free radicals and protects PUFA’s within cell membrane and plasma lipoproteins, and lastly prevents alteration of cells D. 4. The major form, good food sources for each vitamin as well as for beta-carotene 5. Know vitamin A inter-conversion and functions. Different functions of different forms 6. What is the common feature of vitamin E and C? 7. What vitamins functions like a hormone? Vitamin A- reacts as hormone; binds to nuclear receptors in specific target cells + regulates genetranscription 8. What are the factors important for vitamin D synthesis in our body ? <Water-soluble vitamins>
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nutrition study guide - Nutrition 130, Fall 2008. Exam # 3:...

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