Nutrition 2 - Protein Flashcards
What is protein used for?
Repair and Maintenance of body tissues
Haemoglobin, Enzymes and some hormones produced from protein
Antibodies formed from protein
What source do antibodies come from?
Protein
How many essential amino acids are there?
8
What is an essential amino acid for growth in children?
Histidine
When can cysteine become an essential amino acid?
When the person had a limited dietary intake of Methionine
What percentage does protein turnover contribute to BMR?
20%
How do you maintain a positive nitrogen balance?
Nitrogen intake must exceed the daily losses
When sleeping, what happens to nitrogen?
Nitrogen excretion high, turnover protein and not replenishing nitrogen
How would you measure protein turnover?
Over a 24hr period
What is the biological value of food?
Mix of quantity and quality
Based upon how well a a food supplies essential amino acids
What is a low quality protein?
Low levels of essential amino acids
What is the amino acid score of a protein?
Is the value of the limiting amino acid expressed as a percentage of the same amino acid in hens egg protein
What are consequences of high protein intake?
Bone demineralisation, effect teeth
Renal function
