Cm chapter 4

1. The concentration of a normal urine specimen can be

estimated by which of the following?A. Color

B. Clarity

C. Foam

D. Odor2. The normal yellow color of urine is produced by:A. Bilirubin

B. Hemoglobin

C. UrobilinogenD. Urochrome3. A yellow-brown specimen that produces a yellow foam

when shaken can be suspected of containing:A. Bilirubin

B. Carrots

C. HemoglobinD. Rhubarb4. A urine that turns black after standing may contain:A. Homogentisic acidB. Melanin

C. MethemoglobinD. All of the above5. Specimens that contain intact RBCs can be visually

distinguished from those that contain hemoglobin

because:A. Hemoglobin produces a much brighter red color

B. Hemoglobin produces a cloudy, pink specimen

C. RBCs produce a cloudy specimen

D. RBCs are quickly converted to hemoglobin6. After eating beets purchased at the local farmers market, Mrs. Williams notices that her urine is red, but

Mr. Williams urine remains yellow. The Williamses

should:A. Be concerned because red urine always indicates

the presence of blood

B. Not be concerned because all women produce red

urine after eating beets

C. Be concerned because both of them should have

red urine if beets are the cause

D. Not be concerned because only Mrs. Williams is

genetically susceptible to producing red urine

from beets7. Specimens from patients receiving treatment for urinary

tract infections frequently appear:A. Clear and redB. Viscous and orange

C. Dilute and pale yellowD. Cloudy and red8. Freshly voided normal urine is usually clear; however,

if it is alkaline, a white turbidity may be present due

to:

A. Amorphous phosphates and carbonates

B. Uroerythrin

C. WBCs

D. Yeast9. Microscopic examination of a clear urine that produces

a pink precipitate after refrigeration will show:A. Amorphous uratesB. Porphyrins

C. Red blood cellsD. Triple phosphate crystals10. Under what conditions will a port-wine urine color

be observed in a urine specimen?A. The patient has eaten Clorets.

B. Melanin is present.

C. Urine contains porphyrins.

D. The patient has a Pseudomonas infection.11. Which of the following specific gravities would be

most likely to correlate with a dark yellow urine?A. 1.005

B. 1.010

C. 1.020

D. 1.03012. True or False: Urine specific gravity is equally influenced by the presence of glucose and sodium.13. In what circumstance might a sediment be slightly

warmed prior to microscopic examination?A. To hemolyze RBCs

B. To dissolve amorphous urates

C. To increase the specific gravity

D. To correct for temperature in determining the specific

Gravity14. A urine specific gravity measured by refractometer is

1.029, and the temperataure 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

15. Refractive index compares:

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 solution16. Refractometers are calibrated using:A. Distilled water and protein

B. Distilled water and blood

C. Distilled water and sodium chloride

D. Distilled water and urea17. A correlation exists between a specific gravity of

1.050 and a:A. 2_ glucose

B. 2_ protein

C. First morning specimenD. Radiographic dye infusion18. An alkaline urine turns black upon standing, develops

a cloudy white precipitate, and has a specific

gravity of 1.012. The major concern about this specimen

would be:A. Color

B. Turbidity

C. Specific gravityD. All of the above19. The reading of distilled water by the refractometer is

1.003. You should:A. Subtract 1.003 from each specimen reading

B. Add 1.003 to each specimen reading

C. Use a new refractometer

D. Adjust the set screw20. A urine specimen with a specific gravity of 1.008 has

been diluted 1:5. The actual specific gravity is:A. 1.008

B. 1.040

C. 1.055

D. 5.04021. The method for determining a urine specific gravity

that is based on the principle that the frequency of a

sound wave entering a solution changes in proportion

to the density of the solution is:A. Colorimetric

B. Harmonic oscillation densitometry

C. Refractometry

D. Urinometry22. A specimen with a specific gravity of 1.005 would be

considered:A. IsosthenuricB. Hyposthenuric

C. HypersthenuricD. Not urine23. True or False: Specific gravity is of more diagnostic

value than osmolarity in evaluating renal concentration

ability.

24. A strong odor of ammonia in a urine specimen could

indicate:A. Ketones

B. Normal

C. Phenylketonuria

D. Urinary tract infection25. The microscopic of a cloudy amber urine is reported

as rare WBCs and epithelial cells. What does this

suggest?A. Urinary tract infection

B. Dilute random specimen

C. Precipitated amorphous urates

D. Possible mix-up of specimen and sediment26. A specimen with a strong ammonia odor and a heavy

white precipitate when it arrives in the laboratory

may require:A. Collection of a fresh specimen

B. Centrifugation

C. Dilution for specific gravity

D. Testing under a hood