Lab values & electrolytes worksheet with answers

Which fasting blood glucose is within the typical normal range for an adult without diabetes?

1. A45 mg/dL (2.5 mmol/L)
2. B85 mg/dL (4.7 mmol/L)
3. C210 mg/dL (11.7 mmol/L)
4. D140 mg/dL (7.8 mmol/L)

Which type of white blood cell is normally the most numerous in an adult's blood?

1. ANeutrophils
2. BMonocytes
3. CLymphocytes
4. DEosinophils

Which is the main cation in the fluid inside the cells?

1. APotassium
2. BCalcium
3. CSodium
4. DChloride

Before giving prescribed IV potassium chloride, which assessment is most important?

1. APupil size and reaction to light
2. BHearing in both ears
3. CUrine output and kidney function
4. DSkin turgor on the forearm

A patient takes high-dose biotin supplements for hair and nails. Why should the nurse report this before blood tests?

1. ABiotin lowers the hemoglobin by destroying the red cells
2. BBiotin causes a true rise in blood glucose in all patients
3. CBiotin makes the blood clot in the tube before testing
4. DBiotin can distort some immunoassays, such as troponin or TSH

Apart from the lithium level, which tests are monitored regularly in long-term lithium therapy?

1. ATroponin and creatine kinase (CK)
2. BINR and the platelet count
3. CKidney function and thyroid function
4. DLiver enzymes and serum amylase

A patient with a round face, central weight gain and purple stretch marks has a glucose of 210 mg/dL (11.7 mmol/L) and a potassium of 3.1 mEq/L. Which condition fits best?

1. ADiabetes insipidus
2. BHypothyroidism
3. CCushing syndrome
4. DAdrenal insufficiency

A man of Mediterranean descent develops dark urine, jaundice and a falling hemoglobin a few days after eating fava beans. Which condition is most likely?

1. AIron-deficiency anemia from poor diet
2. BVitamin B₁₂ deficiency anemia
3. CG6PD deficiency with acute hemolysis
4. DSickle cell crisis with vaso-occlusion