Lecture 7 - Nutrition and the digestion system

Deciency lead to scurvy in humans 18 what do animals

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Unformatted text preview: ucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine •  Infants require addi,onal amino acids 16 What do animals acquire from food? •  Humans: isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine •  Available in milk, eggs, meat, and soybean products •  Complemented diets – grains (rice, wheat and corn) are complemented by legumes (beans and peas) 17 What do animals acquire from food? •  Vitamins –  Serve as coenzymes –  Water ­soluble vitamins (e.g. Vitamin C) are not stored –  Fat ­soluble vitamins (e.g. Vitamin A) are stored in adipose ,ssue (fat) –  Deficiencies of vitamins B1, B6, and B12 can cause nervous system disorders and various forms of anemia –  Not all animals require Vitamins •  Most mammals (except primates) can make Vitamin C (ascorbic acid). Deficiency lead to scurvy in humans 18 What do animals acquire from food? •  Vitamins –  Essen,al vitamins for humans: 19 Skin Pigmenta,on and Vitamin D produc,on •  Cons,tute major protec,on against UVB damage as well as produc,on of Vitamin D UV d amag e Vitam produ in D c,on 20 Phenylketonuria •  Gene,c disease where individual cannot convert phenylalanine into tyrosine –  Untreated PKU can lead to intellectual disability, seizures, and other serious medical problems –  PKU is commonly included in the newborn screening panel of most countries –  Diet with low phenylalanine and high tyrosine 21 Low food consump,on •  Undernourished/Malnutri,on –  Too liale food to meet its energy requirements –  “self consump,on” begins with the energy storage of glycogen and fat –  Protein turnover decrease because of lack of amino acids –  Blood plasma proteins get process •  Decreases the blood plasma pressure and causes edema (kwashiorkor – deficiency in proteins) 22 Low food consump,on •  Scurvy is a disease resul,ng in the deficiency of vitamin C, which is required for collagen produc,on –  The person with this disease looks pale, feels depressed and is par,ally immobilized –  It can result in open wounds, lost of teeth, fever...
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This document was uploaded on 03/05/2014.

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