Nutrition Review_3 FINAL COPY

Nutrition Review_3 FINAL COPY - NTR 311 Exam 3 review...

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NTR 311 Exam 3 review handout WATER SOLUBLE VITAMINS 1. Vitamins: nutrients, organic, essential, not energy yielding, not digested, classified by solubility (either water soluble or fat soluble) 2. 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 - destroyed by heat, leaks out into cooking water Pork (best source), Whole/ enriched grains, Legumes, Sunflower seeds - Deficiency – - Beri – beri first started seeing this in Asia when they started refining rice Wet (cardiovascular)- edema, can cause heart damage or failure Dry (nerve)- diets low in thiamin/calories, muscles waste away from nerve damage - Wernicke - Korsakoff syndrome seen in alcoholics, developing countries - symptoms Nystagmus- back and forth movement of the eyes, Weakness of eye muscles, Loss of coordination, act like your drunk, Gradual mental impairment Riboflavin - Function: coenzyme (energy metabolism), very involved in energy pathways - Food sources - Milk/ milk products, liver, mollusks, eggs, meats, mushrooms, whole/enriched grains, some vegetables, asparagus, peanuts - Deficiency: no disease, just skin problems symptoms - Inflammation: mouth/tongue, skin, eyes,Niacin -Glossitis is a swollen tongue --Inflammation of skin, eyes, and GI tract --usually seen in alcoholics Niacin - Function: coenzyme (energy metabolism very involved throughout energy pathways) and alcohol metabolism - Food sources - Protein rich foods: meat, fish, poultry, peanut butter; whole and enriched grains, vegetables (aspargus, mushrooms, potatoes), peanuts
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NTR 311 Exam 3 review handout - Tryptophan niacin conversion (food sources of niacin include high protein foods) - Deficiencies: - Disease - Pellegra - Symptoms - the 4 D's: dermatitis (skin failure, exposed to sunlight), diarrhea, dementia (nervous system fails and mental faculties are lost), and death - Toxicity: symptoms - Supplementation Pharmacological doses - Used as treatment for decreasing blood cholesterol (LDL) Symptoms -"Niacin flush": tingly, red face -Exacerbates liver damage and peptic ulcers -A tolerable Upper Limit (UL) has been set Panthothenic acid: Function: coenzyme -energy metabolism -chemical structutre of coenzyme A -synthesis of lipids, neurotransmitters, steroid hormones, and hemoglobin - Food sources: widespread in foods; beef, poultry, whole grains, potatoes, tomatoes, broccoli, liver; easily destroyed by food processing Deficiencies: -Rare -Failure of Body Systems -Fatigue, GI distress, neuro disturbances -"Burning Feet" - Biotin - Function: coenzyme (energy metabolism) - Delivers a carbon to 3-carbon pyruvate, thus replenishing oxaloacetate, the 4-carbon compound needed to combine with Acetyl CoA to keep the TCA cycle turning - Participates in gluconeogenisis, fatty acid synthesis, and the breakdown of certain fatty acids and amino acids
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This test prep was uploaded on 04/16/2008 for the course NTR 311 taught by Professor Lydiasteinman during the Fall '08 term at University of Texas.

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Nutrition Review_3 FINAL COPY - NTR 311 Exam 3 review...

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