Nonprotein Nitrogen Compounds

Question 1

It is the major excretory product of metabolism of proteins

a) Creatinine
b) Uric acid
c) Urea
d) Ammonia

Answer 1

c) Urea

Question 2

Which analytical method is the reference method used in Ammonia?

a) Urease method
b) Nesslerization
c) Berthelot
d) IDMS

Answer 2

d) IDMS

Question 3

What is the end product in nesslerization method?

a) dimercuric sulfide iodide
b) dimercuric carbon iodide
c) dimercuric ammonium iodide
d) indophenol blue

Answer 3

c) dimercuric ammonium iodide

Question 4

What would be the end color of dimercuric ammonium iodide in nesslerization method?

a) Purple
b) Blue
c) Green
d) Yellow-orange

Answer 4

d) Yellow-orange

Question 5

All of the following variables are included in Cockgroft-Gault formula, except:
i. age
ii. race
iii. body weight
iv. serum creatinine

a) i only
b) ii only
c) iii only
d) none of the choices

Answer 5

b) ii only

Cockgroft-Gault formula:
C = (140 - age) (ideal body weight) / 72 x serum creatinine in mg/dL

Question 6

A GFR of 30 mL/min/1.73 m2 is indicative of what stage of chronic kidney disease?

a) Stage 2
b) Stage 3
c) Stage 4
d) Stage 5

Answer 6

b) Stage 3

Question 7

Product of the catabolism of purines

a) Creatinine
b) Uric acid
c) Urea
d) Ammonia

Answer 7

b) Uric acid

Question 8

In caraway method, what would be the expected end color of the product?

a) Purple
b) Yellow
c) Blue
d) Colorless

Answer 8

c) Blue

Question 9

All of the following are clinical significance of hypouricemia, except:

a) fanconi syndrome
b) lesch-nyan syndrome
c) purine inhibitors
d) allopurinol

Answer 9

b) lesch-nyan syndrome

Question 10

It is produced from the catabolism of amino acids

a) Creatinine
b) Uric acid
c) Urea
d) Ammonia

Answer 10

d) Ammonia