protein Flashcards
1
Q
what are proteins made out of?
A
- essential amino acids (building blocks)
2
Q
name some amino acids
A
histidine, isoleucine, leucine, cosine, methionine, threonine, valine
3
Q
what is proteins/amino acids function in the body?
A
- provide structure to cells in body - enzymes increase rate of metabolic reactions - amino acids central role in metabolism of organs and tissues - precursors and regulators of synthesis of neurotransmitters, hormones, DNA and RNA
4
Q
what does protein balance tell us?
A
- if a person protein is adequate - measured with protein consumption and how much exits - losses through skin, sweat and hair - mainly urine and faeces
5
Q
what is the major site for protein synthesis
A
the liver. metabolism of protein - source of energy - liver converts urea to be secreted in urine
6
Q
how much nitrogen is in 1g of protein
A
- 6.25g
7
Q
how is nitrogen entering system worked out?
A
- protein intake divided by 6.25
8
Q
what is nitrogen balance?
A
when goes in must eventually come out. protein consumed exceed protein losses 9+ protein Blaine) losses exceeding is a - protein balance
9
Q
requirements of protein intake
A
enough to avoid a negative protein balance
10
Q
what is a limitation of nitrogen balance
A
- no info of tissues, lacks sensitivity, positive balance may not relate to lean body mass
11
Q
A
