Week 2 Platings

Question 1

Macroscopic screening of urine specimens is used to:

a. Decrease the need for polarized microscopy

b. Predict the type of urinary casts present

c. Predict the type of urinary crystals present

d. Enhance cost-effectiveness of urinalysis

Answer 1

Enhance cost-effectiveness of urinalysis

Question 2

Which of the following is a tubular secretion test?

a. Specific gravity

b. Osmolality

c. Titrable acidity

d. Creatinine clearance

Answer 2

Tritrable acidity

Question 3

The concentration of a normal urine specimen can be estimated by which of the following?
A. Color
B. Clarity
C. Foam
D. Odor

Answer 3

A. Color

Question 4

The normal yellow color of urine is produced by: A. Bilirubin
B. Hemoglobin
C. Urobilinogen
D. Urochrome

Answer 4

D. Urochrome

Question 5

The presence of bilirubin in a urine specimen produces a:
A. Yellow foam when shaken
B. White foam when shaken
C. Cloudy specimen
D. Yellow-red specimen

Answer 5

A. Yellow foam when shaken

Question 6

A urine specimen containing melanin will appear: A. Pale pink
B. Dark yellow
C. Blue-green
D. Black

Answer 6

Black

Question 7

A patient with a viscous orange specimen may have been:
A. Treated for a urinary tract infection
B. Taking vitamin B pills
C. Eating fresh carrots
D. Taking antidepressants

Answer 7

A. Treated for a urinary tract infection

Question 8

The presence of a pink precipitate in a refrigerated speci- men is caused by:
A. Hemoglobin
B. Urobilin
C. Uroerythrin
D. Beets

Answer 8

C. Uroerythrin

Question 9

Microscopic examination of a clear urine that produces a white precipitate after refrigeration will show:
A. Amorphous urates
B. Porphyrins
C. Amorphous phosphates
D. Yeast

Answer 9

C. Amorphous phosphates

Question 10

The color of urine containing porphyrins will be: A. Yellow-brown
B. Green
C. Orange
D. Port wine

Answer 10

D. Port wine

Question 11

Which of the following specific gravities would be most likely to correlate with a urine that is pale yellow?
A. 1.005
B. 1.010
C. 1.020
D. 1.030

Answer 11

A. 1.005

Question 12

A urine specific gravity measured by a refractometer is 1.029, and the temperature of the urine is 14°C. The specific gravity should be reported as:
A. 1.023
B. 1.027
C. 1.029
D. 1.032

Answer 12

C. 1.029

Question 13

The principle of refractive index is to compare:
A. Light velocity in solutions with light velocity
in solids
B. Light velocity in air with light velocity in solutions
C. Light scattering by air with light scattering by solutions
D. Light scattering by particles in solution

Answer 13

B. Light velocity in air with light velocity in solutions

Question 14

13. A correlation exists between a specific gravity by a refractometer of 1.050 and a:
    A. 2+ glucose
    B. 2+ protein
    C. First morning specimen
    D. Radiographic dye infusion

Answer 14

D. Radiographic dye infusio

Question 15

A cloudy urine specimen turns black upon standing and has a specific gravity of 1.012. The major concern about this specimen would be:
A. Color
B. Turbidity
C. Specific gravity
D. All of the above

Answer 15

A. Color

Question 16

A specimen with a specific gravity of 1.035 would be considered:
A. Isosthenuric
B. Hyposthenuric
C. Hypersthenuric
D. Not urine

Answer 16

C. Hypersthenuric

Question 17

A specimen with a specific gravity of 1.001 would be considered:
A. Hyposthenuric
B. Not urine
C. Hypersthenuric
D. Isosthenuric

Answer 17

B. Not urine

Question 18

A strong odor of ammonia in a urine specimen could indicate:
A. Ketones
B. Normalcy
C. Phenylketonuria
D. An old specimen

Answer 18

D. An old specimen

Question 19

The microscopic examination of a clear red urine is reported as many WBCs and epithelial cells. What does this suggest?
A. Urinary tract infection
B. Dilute random specimen
C. Hematuria
D. Possible mix-up of specimen and sediment

Answer 19

D. Possible mix-up of specimen and sediment

Question 20

Which of the following would contribute the most to a urine osmolality?
A. One osmole of glucose
B. One osmole of urea
C. One osmole of sodium chloride
D. All contribute equally

Answer 20

C. One osmole of sodium chloride

Question 21

Which of the following colligative properties is not stated correctly?
A. The boiling point is raised by solute
B. The freezing point is raised by solute
C. The vapor pressure is lowered by solute
D. The osmotic pressure is raised by solute

Answer 21

B. The freezing point is raised by solute

Question 22

An osmole contains:

A. One gram molecular weight of solute dissolved in 1
liter of solvent
B. One gram molecular weight of solute dissolved in 1 kilogram of solvent
C. Two gram molecular weights of solute dissolved in 1 liter of solvent
D. Two gram molecular weights of solute dissolved in 1 kilogram of solvent

Answer 22

B. One gram molecular weight of solute dissolved in 1 kilogram of solvent

Question 23

The unit of osmolality measured in the clinical laboratory is the:
A. Osmole
B. Milliosmole
C. Molecular weight D. Ionic charge

Answer 23

A. Osmole

Question 24

In the reagent strip specific gravity reaction, the polyelectrolyte:
A. Combines with hydrogen ions in response to ion concentration
B. Releases hydrogen ions in response to ion concentration
C. Releases hydrogen ions in response to pH
D. Combines with sodium ions in response to pH

Answer 24

B. Releases hydrogen ions in response to ion concentration

Question 25

Which of the following will react in the reagent strip specific gravity test?
A. Glucose
B. Radiographic dye
C. Protein
D. Chloride

Answer 25

D. Chloride