Quantitation of a substance that varies with daily activities should be performed on a:
A) Timed overnight specimen
B) First morning specimen
C) 24-hour specimen
D) 2-hour postprandial specimen

Question

Quizplus · Accepted Answer

A 24-hour urine specimen is the best choice for quantifying a substance that varies with daily activities, as it provides an average level over an entire day of activity. Timed overnight specimens may not capture fluctuations that occur during the day, while first morning specimens and 2-hour postprandial specimens may not reflect typical daily variation.

Quantitation of a Substance That Varies with Daily Activities Should