CMLA Urinalysis 4

Question 1

When performing a urine dipstick test, how long should the strip be immersed in the urine?

Accepted Answer

Briefly, approximately 1 second

Answer

The dipstick should be briefly immersed for about 1 second to prevent leaching of reagents from the pads.

Question 2

A urine pH of 8.5 in a freshly voided specimen may suggest:

Accepted Answer

Urinary tract infection with urease-producing bacteria

Answer

Urease-producing bacteria (e.g., Proteus) split urea into ammonia, raising urine pH to alkaline levels.

Question 3

What is the correct order for urine sediment examination using a microscope?

Accepted Answer

Low power first, then high power

Answer

Urine sediment is first scanned under low power (10x) to identify casts and other structures, then examined at high power (40x) for detail.

Question 4

Urobilinogen is increased in urine in which condition?

Accepted Answer

Hemolytic anemia

Answer

Hemolytic anemia increases bilirubin production, leading to increased urobilinogen formation and excretion in urine.

Question 5

Which preservative is added to urine specimens for culture and sensitivity testing?

Accepted Answer

Boric acid

Answer

Boric acid preserves urine for culture by inhibiting bacterial growth without killing organisms, maintaining colony counts.

(CMLA) Certified Medical Laboratory Assistant Practice Test