Non-Protein Nitrogen (NPN)

Question 1

NPN found in the human body are (from greatest to lowest concentration):

Answer 1

Urea, amino acids, uric acid, creatinine, creatine, and ammonia

Question 2

Urea in the form of blood urea nitrogen (BUN) comprises up to ___ of the body’s total NPN.

Answer 2

50%

Question 3

_____is the major excretory product of the kidney, and so, along with ____ and ______ (anhydrous cretine), plays a role in kidney function tests.

Answer 3

Urea
uric acid
creatinine

Question 4

NPN’s are increased in _____.

Answer 4

renal faliure

Question 5

___________ are also helpful in testing liver function

Answer 5

Ammonia determination tests