Lab values & electrolytes worksheet with answers

Free printable Lab values & electrolytes worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy

Tapping on the facial nerve in front of the ear makes the corner of the mouth twitch. What is this sign called, and what does it suggest?

  1. AChvostek’s sign, suggesting low calcium
  2. BHomans’ sign, suggesting high potassium
  3. CBabinski’s sign, suggesting low sodium
  4. DTrousseau’s sign, suggesting high calcium
2.Easy

What does the term "thrombocytosis" mean?

  1. AA high white cell count
  2. BA low platelet count
  3. CA high platelet count
  4. DA low red cell count
3.Easy

How does dehydration usually affect the hematocrit?

  1. AIt lowers it
  2. BIt makes it zero
  3. CIt raises it
  4. DIt has no effect
4.Medium

A patient with joint aches has a positive antinuclear antibody (ANA) test. Which statement is correct?

  1. AA positive ANA rules out all other autoimmune diseases
  2. BA positive ANA means the patient has a viral infection
  3. CA positive ANA proves the patient has rheumatoid arthritis
  4. DA positive ANA supports lupus but does not diagnose it alone
5.Medium

An older adult with chronic kidney disease starts trimethoprim-sulfamethoxazole for a urinary tract infection. Which electrolyte should be monitored closely?

  1. ACalcium, because the drug binds calcium in the gut
  2. BChloride, because the drug causes chloride loss
  3. CSodium, because the drug causes heavy sodium retention
  4. DPotassium, because trimethoprim can raise it
6.Medium

A nurse completed the hepatitis B vaccine series. Which result shows protective immunity?

  1. AA raised ALT level
  2. BA positive HBsAg test
  3. CA positive IgM anti-HBc
  4. DAnti-HBs of 10 mIU/mL or more
7.Hard

A patient receiving IV magnesium sulfate has a respiratory rate of 9/min and absent patellar reflexes. After stopping the infusion, which medication should the nurse expect to give?

  1. APotassium chloride
  2. BCalcium gluconate
  3. CProtamine sulfate
  4. DSodium bicarbonate
8.Hard

Which set of results best shows that diabetic ketoacidosis is resolving?

  1. AA falling glucose with a falling serum bicarbonate
  2. BA rising potassium with a falling bicarbonate
  3. CA falling glucose with a still widening anion gap
  4. DA closing anion gap with a rising bicarbonate and pH

Answer key

  1. 1. A · Chvostek’s sign, suggesting low calcium
  2. 2. C · A high platelet count
  3. 3. C · It raises it
  4. 4. D · A positive ANA supports lupus but does not diagnose it alone
  5. 5. D · Potassium, because trimethoprim can raise it
  6. 6. D · Anti-HBs of 10 mIU/mL or more
  7. 7. B · Calcium gluconate
  8. 8. D · A closing anion gap with a rising bicarbonate and pH

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