AMINO ACID METABOLISM

Question 1

how do you work out nitrogen balance

Answer 1

nitrogen ingested - nitrogen excreted

Question 2

what is nitrogen eqbm

Answer 2

protein synthesis + protein degradation

Question 3

what is positive nitrogen balance

Answer 3

protein synthesis> degradation

Question 4

what is negative nitrogen balance

Answer 4

protein synthesis < degradation

Question 5

what are the AA precursors of neurotransmitter

Answer 5

glycine
aspartate
glutamate

Question 6

what is tyrosine a precursor of

Answer 6

catecholamine
dopamine
adrenaline
noradrenaline
thyroxine

Question 7

what is precursor of serotonin + melatonin

Answer 7

tryptophan

Question 8

what is precursor of nitric oxide

Answer 8

arginine

Question 9

what is precursor of histamine

Answer 9

histidine

Question 10

what does essential and nonessential AAs mean

Answer 10

nonessential = synthesised y our body
essential = body can't make them so must be in diet

Question 11

what are 2 types of degradation of AA

Answer 11

glycogenic

ketogenic

Question 12

what does glycogenic AA mean

Answer 12

AA degraded to glucose from carbon skeleton by gluconeogenesis

Question 13

what does ketogenic AA mean

Answer 13

AA degraded to acetyl CoA

only Lysine + Leucine