2.3.1 Nonprotein Nitrogen Compounds (Urea)

Question 1

Urea is the Lowest concentration in the blood

T or F

Answer 1

F

Highest

Question 2

Urea comprises of __________ of NPN mass in plasma

a. 45 - 50%
b. 50 - 55%
c. 40 - 45%
d. 35 - 40%

Answer 2

a

Question 3

Urea is formed in the ______ from CO2 and ammonia

Answer 3

liver

Question 4

Urea is not associated with the detoxification function of the liver

T or F

Answer 4

F

Associated

Question 5

Urea is a non toxic form of ammonia

T or F

Answer 5

T

Question 6

Major excretory product of protein metabolism and other nitrogen-containing chemicals.

Answer 6

Urea

Question 7

Convert BUN to urea (Formula)

Answer 7

BUN x 2.14

Question 8

Reference method for Urea

Answer 8

IDMs

Question 9

Chemical Method for Urea?

a. Jaffe method
b. Phophotungstic Acid method
c. Fearon Method

Answer 9

c

Question 10

Product for Fearon method when Diacetyl combine with urea?

a. Diacetyl monoxime
b. Formazan
c. Diazine

Answer 10

c

Question 11

Color of diazine?

Answer 11

Yellow

Question 12

Enzymatic method for urea:

Colorimetric:
- Nesselrization
- Berthelot

T or F

Answer 12

T

Question 13

Enzymatic method for urea:

GLDH-Couple enzymatic

T or F

Answer 13

T

Question 14

Enzymatic method for urea:

Conductimetric is a measurement of the increase in conductivity due to the ___ and CO3^2- ions

a. Urea
b. NH4
c. Uric acid

Answer 14

NH4 (Ammonia)

Question 15

Berthelot reaction in enzymatic method for urea, the indophenol is color?

Answer 15

Blue

Question 16

Enzymatic method for Urea:

Glutamate dehydrogenase coupled because the initial reaction is
catalyze by _______

a. Urease
b. Lipase
c. Dehydrogenase
d. Bromase

Answer 16

a

Question 17

What is the end product for Nesslerization?

a. Indophenol
b. NAD
c. Ammonia and Carbon monoxide
d. Dimercuric ammonium iodide

Answer 17

d

Question 18

In Nesslerization, the dimercuric ammonium iodide is what color?

Answer 18

Yellow

Question 19

Enzymatic method for Urea:

If H is the end (NADH) High
absorbance

if D is the end (NAD) decrease absorbance at 340nm

T or F

Answer 19

T

Question 20

Reference interval for urea

a. 6-20 mg/dl
b. 5-15 mg/dl
c. 7-25 mg/dl
d. 8-20 mg/dl

Answer 20

a

Question 21

Azotemia:

BUN: Elevated
Creatinine: Normal

Low blood volume, dehydrated, high protein diet, increase protein catabolism

a. Prerenal
b. Renal
c. Postrenal

Answer 21

a

Question 22

Azotemia:

BUN: Elevated
Creatinine: Elevated
Excretion: Decrease

Glomerulonephritis and renal failure

a. Prerenal
b. Renal
c. Postrenal

Answer 22

b

Question 23

Azotemia:

BUN: Elevated
Creatinine: Elevated
Excretion: Decrease

Urinary tract obstruction of stone and tumors

Nephrolithiasis, tumors, severe infection

a. Prerenal
b. Renal
c. Postrenal

Answer 23

c

Question 24

Uremia/Uremic syndrome is always characterized by ___________ of BUN and creatinine.

Answer 24

elevations

Question 25

Uremia is associated with renal failure and very high plasma urea concentration

T or F

Answer 25

T