RMA Urinalysis 2

Question 1

A urine specimen left at room temperature for two hours before testing may show a falsely elevated pH. What causes this change?

Accepted Answer

Bacteria converting urea to ammonia

Answer

Bacteria break down urea into ammonia, raising the pH of a standing specimen.

Question 2

Which urine collection method is preferred for an accurate routine urinalysis with the least contamination?

Accepted Answer

First morning clean-catch midstream

Answer

A first morning clean-catch midstream specimen is concentrated and minimizes contamination.

Question 3

A reagent strip shows a positive nitrite result. This most strongly suggests the presence of what?

Accepted Answer

Gram-negative bacteria

Answer

Many gram-negative bacteria reduce urinary nitrate to nitrite, indicating a possible UTI.

Question 4

What is the normal expected color of a freshly voided, properly hydrated urine specimen?

Accepted Answer

Pale yellow to amber

Answer

Normal urine ranges from pale yellow to amber due to the pigment urochrome.

Question 5

Before dipping a reagent strip, the medical assistant should ensure the urine specimen is at what temperature?

Accepted Answer

Room temperature

Answer

Reagent strip reactions are calibrated for room-temperature specimens.

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