CMLA Urinalysis 2

Question 1

Which urine color is most associated with concentrated urine due to dehydration?

Accepted Answer

Dark amber

Answer

Dark amber urine indicates high concentration of urochrome pigment, typically seen with dehydration.

Question 2

A urine dipstick shows a positive nitrite result. What does this most likely indicate?

Accepted Answer

Bacterial infection

Answer

Positive nitrite on dipstick indicates bacteria (typically gram-negative) have converted urinary nitrates to nitrites.

Question 3

What is the normal specific gravity range for urine?

Accepted Answer

1.001–1.030

Answer

Normal urine specific gravity ranges from 1.001 to 1.030, reflecting the kidney's concentrating and diluting ability.

Question 4

Which formed element in urine sediment is a cast composed entirely of red blood cells?

Accepted Answer

RBC cast

Answer

RBC casts form when red blood cells become trapped in the tubular lumen and indicate glomerulonephritis.

Question 5

A urine sample has a strong ammonia odor. What is the most likely cause?

Accepted Answer

Bacterial decomposition

Answer

Bacterial decomposition of urea produces ammonia, causing a strong ammonia odor in urine left at room temperature.

(CMLA) Certified Medical Laboratory Assistant Practice Test