ntr 311 review3 fall 2007

ntr 311 review3 fall 2007 - NTR 311 Exam 3 review handout...

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NTR 311 Exam 3 review handout WATER SOLUBLE VITAMINS - Vitamins: nutrients, organic, essential, not energy yielding, not digested, classified by solubility - Water soluble vitamins: Hydrophilic - absorbed in bloodstream, circulate freely in blood, excess excreted in urine, generally not toxic o B Vitamins Thiamin - Function: coenzyme (energy metabolism), maintenance nervous tissue - Food sources: BEST*pork*, whole/enriched grains, legumes, sunflower seeds. - Deficiency – - Beri – beri Symptoms (wet / dry) - Wernicke - Korsakoff syndrome symptoms Riboflavin - Function: coenzyme (energy metabolism), synthesis of other compounds such as neurotransmitters and vitamins - Food sources : *milk/milk products*, liver, mollusks, eggs, meats, mushrooms, whole/enriched grains, some veg. - Deficiency: - Symptoms: INFLAMMATION of Mouth/tongue Skin Eyes GI tract Niacin - Function: coenzyme (energy metabolism and alcohol metabolism) - Food sources: *protein* whole/enriched grains, veg(asparagus, mushrooms, potatoes), peanuts - Tryptophan niacin conversion(conversion inefficient lot of trypto to make little niacin) (food sources of niacin include high protein foods) - Deficiencies: - Disease - Pellegra - Symptoms—4D’s : dermatis, diarrhea, dementia, death - Corn—niacin not available for absorption - Toxicity: symptoms - Supplementation Pharmacological doses - Used as treatment for decreasing blood cholesterol
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NTR 311 Exam 3 review handout Symptoms: niacin flush: blood vessels dilate, skin get red and tingly---painful, exacerbates liver damage---ulcers Panthothenic acid: - Function: coenzyme -energy metabolism - Food sources: - Deficiencies: symptoms Biotin - Function: coenzyme (energy metabolism) - Sources - Produced by bacteria in gut - Food sources - Deficiencies: symptoms
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NTR 311 Exam 3 review handout Vitamin B6 - Function: coenzyme - amino acid metabolism - Food Sources: Meat, fish, poultry, ***fruits (bananas & watermelon), enriched/whole grains, veggies (acorn squash and potatoes) - Deficiencies: RARE b/c stored in muscles - Symptoms: seen in alcoholics, alcohol interferes - Toxicity - Symptoms: nerve damage, UL Folic acid - Function: coenzyme - Amino acid metabolism - Synthesis of DNA needed for rapidly growing cells in embryo, rapid cell turnover in digestive tract, red blood cells - Source: - Synthetic folate is more bioavailable than dietary folate. - Food sources of folate: green leafy veggies, legumes, enriched grains, ***fruits (avocado and oranges), veggies(asparagus) - Explain the association between folate and neural tube defects in newborns. - Around spinal cord doesn’t close…rapidly growing cells in embryo - Deficiency: - Causes: increased needs, impaired absorption, decreased intake, drug induced - Symptoms: Macrocytic hyperchromic anemia (immature RBCs) GI tract deterioration Vitamin B12 - Function: coenzyme (converts folate to active folate)- - DNA synthesis / amino acid synthesis - maintains sheath around nerves (diff from FA)
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ntr 311 review3 fall 2007 - NTR 311 Exam 3 review handout...

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