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Select the one best response to each question!
The concentration of a normal urine specimen can be estimated by which of the following?
|1. The concentration of a normal urine specimen can be estimated by which of the following?
|2. The normal yellow color of urine is produced by:
|3. A yellow-brown specimen that produces a yellow foam when shaken can be suspected of containing:
|4. A urine that turns black after standing may contain:
A. Homogentisic acid
D. All of the above
|5. 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 hemoglobin
|6. After eating beets purchased at the local farmers’ market, Mrs. Williams notices that her urine is red, but Mr. William’s 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 beets
|7. Specimens from patients receiving treatment for urinary tract infections frequently appear:
A. Clear and red
B. Viscous and orange
C. Dilute and pale yellow
D. Cloudy and red
|8. 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
|9. Microscopic examination of a clear urine that produces a pink precipitate after refrigeration will show:
A. Amorphous urates
C. Red blood cells
D. Triple phosphate crystals
|10. 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?
|12. 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 gravity
|14. A urine specific gravity measured by refractometer is 1.029, and the temperataure of the urine is 14C. The specific gravity should be reported as:
|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 solution
|16. Refractometers are calibrated using:
A. Distilled water and protein
B. Distilled water and blood
C. Distilled water and sodium chloride
D. Distilled water and urea
|17. A correlation exists between a specific gravity of 1.050 and a:
A. 2 glucose
B. 2 protein
C. First morning specimen
D. Radiographic dye infusion
|18. 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:
C. Specific gravity
D. All of the above
|19. 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 screw
|20. A urine specimen with a specific gravity of 1.008 has been diluted 1:5. The actual specific gravity is:
|21. 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:
B. Harmonic oscillation densitometry
|22. A specimen with a specific gravity of 1.005 would be considered:
D. Not urine
|23. 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:
D. Urinary tract infection
|25. 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 sediment
|26. 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
C. Dilution for specific gravity
D. Testing under a hood