Which one of the following analytes shows no difference in composition between a serum and a plasma specimen?

What specific specimen collection procedures should be observed when assessing zinc deficiency?

One can determine if hypokalemia is a result of a pre-analytical error (IV fluid contamination of blood tube) or a true physiological hypokalemia because a change in blood pH will be observed.

In a fasting individual with a normal hematocrit, whole-blood glucose values are approximately what percent different from plasma glucose values?

In a continuous-monitoring assessment of an enzyme reaction rate, which one of the following is the preferable measurement?

Which one of the following statements concerning TIBC is not correct?

Hypokalemia may be caused by each of the following EXCEPT:

In the 3-step assay for determination of cholesterol concentration, cholesteryl esters must be cleaved by an enzyme. This hydrolytic cleavage forms:

The primary serum test to screen for thyroid disease is:

A hospital patient is receiving amikacin for her Enterobacter infection, which seems to be resistant to all other antibiotics. Her physician is somewhat unfamiliar with the antibiotic and wants to know what laboratory analyses can be performed to assess this antibiotic’s efficacy and risk of toxicity. You suggest: