A microscopic analysis of a urine sample yielded a moderate number of RBCs (10-25/hpf). However, the reagent strip blood test was negative. What can cause a false negative on the reagent strip blood test?

A sample was collected for acid phosphatase analysis at 2100 hours, separated, and refrigerated overnight. It was run at 0800 hours the next day. How would this affect the results?

When reviewing the daily results of quality control for the disk diffusion studies, it appears that all of the control zones are too small. What is the most likely reason for this reaction?

Given the data below, calculate the creatinine clearance: Serum creatinine = 1.2 mg/dL Urine volume = 1.75 L/day Urine creatinine = 120 mg/dL Surface area = 1.80 m2    

Which pathway regulates peroxide detoxification in the erythrocyte?

Express 0.0027 μmol/min/mL as μmol/min/L.

Out of the below choices, an increased level of circulating thyroid hormone levels are most indicative of

Which of the following is a cytopathic effect induced by viral growth?

20 uL of whole blood was added to 380 uL of Turk’s diluting solution to perform a manual WBC count. 75 WBCs were counted on 4 large squares in each chamber of the hemocytometer. How many cells/L would be reported?

A stock standard contains 140 Eq/L of sodium and 5 Eq/L of potassium. How would the working standard of 140 mEq/L and 5 mEq/L be prepared, respectively?