CLT Clinical Chemistry & Biochemical Analysis 3

Question 1

Which reagent strip test on a urinalysis detects the presence of bilirubin in urine?

Accepted Answer

Diazonium salt reaction

Answer

Urinary bilirubin is detected by coupling with a diazonium salt on the reagent pad to produce an azo dye, with color intensity proportional to bilirubin concentration.

Question 2

The reference interval for serum potassium in adults is approximately:

Accepted Answer

3.5–5.0 mEq/L

Answer

The normal adult serum potassium reference range is 3.5–5.0 mEq/L; values outside this range indicate hypo- or hyperkalemia.

Question 3

Serum iron studies show low serum iron, low transferrin saturation, and elevated TIBC. Which condition does this pattern suggest?

Accepted Answer

Iron deficiency anemia

Answer

Iron deficiency anemia is characterized by low serum iron, low transferrin saturation, and elevated TIBC as the body upregulates transferrin production to capture scarce iron.

Question 4

Which of the following proteins is measured to assess nutritional status and has a shorter half-life (~2 days), making it a sensitive indicator of acute changes?

Accepted Answer

Prealbumin (transthyretin)

Answer

Prealbumin has a half-life of approximately 2 days, making it far more responsive to acute nutritional changes than albumin (half-life ~20 days).

Question 5

A serum creatinine of 3.2 mg/dL in an adult patient is most consistent with which condition?

Accepted Answer

Significant renal impairment

Answer

Normal serum creatinine in adults is approximately 0.6–1.2 mg/dL; a value of 3.2 mg/dL indicates significantly reduced glomerular filtration and renal impairment.

(CLT) Clinical Laboratory Technologist Certification Practice Test

(CLT) Clinical Laboratory Technologist Certification Practice Test

CLT Clinical Chemistry & Biochemical Analysis 3