Metabolism 64 Flashcards
1
Q
List the sources of free amino acids in the body
A
- Ingested proteins
- Biosynthesis
- Protein breakdown
2
Q
How much protein must be present in the diet to maintain body protein?
A
55g
3
Q
Positive Nitrogen balance in what situations?
A
- Pregnant women
- Growth in children
- Body building
4
Q
Negative Nitrogen balance in what situations?
A
- trauma
- burn injury
- infection
- cancer
- sepsis
- surgery
5
Q
The reasons for nitrogen degradation
A
- form urea for excretion of nitrogen
- degradation of carbon skeletons is used for energy production or storage for glycogen or fat
6
Q
Describe the transamination in terms of substrates, products, and cofactors
A
- amino acid & alpha ketoglutarate
- compound and glutamate
- pyridoxal phsophate
7
Q
How is glutamate is converted to aspartate and ammonia?
A
- aspartate transaminase
- glutamate dehydrogase
8
Q
Primary regulated enzyme in the urea cycle?
A
N-acetylglutamate
9
Q
Enzyme that produces urea from arginine
A
Arginase
10
Q
Which two amino acids are major transporters to the liver?
A
Glutamine & Alanine
