Diurnal variation is a term that refers to:
A) Whether or not a patient is fasting
B) Collection of urine specimens
C) Time of day of specimen collection
D) Whether a patient is resting or exercising
Question 2
Ideally, the best type of centrifuge that separates blood cells and plasma for analysis in the clinical laboratory is:
A) A temperature-controlled centrifuge with spinning buckets that holds 510 mL blood tubes
B) A temperature-controlled centrifuge with fixed buckets and an angled rotor
C) A non-temperature-controlled centrifuge with fixed buckets that hold 510 mL blood tubes
D) A non-temperature-controlled centrifuge with fixed buckets that only hold 1 mL blood tubes
