Home Economics - Protein Basics
Teacher recommended
?- Created by: Max-Rhys
- Created on: 13-10-15 11:36
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- Proteins
- Amino Acids
- They are the building blocks of protein and needed for energy release and for most cells.
- Limiting Amino Acid - The Amino acid in a chain which prevents it from being completed. The unused amino acids are used as an energy source.
- Indispensable Amino Acid - are ones that they body cannot create there are about 11. Must be consumed from food.
- Dispensable amino acids- those that can be made in the body from the indispensable
- Usage
- Growth - Protein is needed in all body cells and without it no more can be created therefore no growth is possible.
- Repair - If cells become damaged protein is required to repair.
- Maintenance- Protein is needed for the production of hormones and enzymes which help maintain homeostatis.
- Deficiency
- Marasmus - Usually in infants, leads to retarded growth. Can lead to build up of fluid beneath skin and slow repair of muscles and cuts
- Kwashiokor- Infants again, retarded growth, extreme weight and muscle loss, oedema and more protein based than energy deficiency based
- Nitrogen Balance
- Nitrogen IN/OUT
- Used to see if protein is in excess (body builders) or deficient (elderly or ill)
- Amino Acids
- Rationale
- 1 gram of protein = 17Kj (4kcal)
- 0.75g per kg of body mass(adults) or 1g per kg body mass (child)
- Proteins
- Amino Acids
- They are the building blocks of protein and needed for energy release and for most cells.
- Limiting Amino Acid - The Amino acid in a chain which prevents it from being completed. The unused amino acids are used as an energy source.
- Indispensable Amino Acid - are ones that they body cannot create there are about 11. Must be consumed from food.
- Dispensable amino acids- those that can be made in the body from the indispensable
- Usage
- Growth - Protein is needed in all body cells and without it no more can be created therefore no growth is possible.
- Repair - If cells become damaged protein is required to repair.
- Maintenance- Protein is needed for the production of hormones and enzymes which help maintain homeostatis.
- Deficiency
- Marasmus - Usually in infants, leads to retarded growth. Can lead to build up of fluid beneath skin and slow repair of muscles and cuts
- Kwashiokor- Infants again, retarded growth, extreme weight and muscle loss, oedema and more protein based than energy deficiency based
- Nitrogen Balance
- Nitrogen IN/OUT
- Used to see if protein is in excess (body builders) or deficient (elderly or ill)
- Amino Acids
- Should provide around 10-15% of energy intake based on size.
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