Lab values & electrolytes worksheet with answers

Which blood marker is the most specific for injury to the heart muscle?

1. ALactate dehydrogenase
2. BSerum myoglobin
3. CCardiac troponin
4. DTotal creatine kinase

What is a main role of albumin in the blood?

1. AIt forms the mesh that holds a blood clot together
2. BIt holds fluid in the vessels by oncotic pressure
3. CIt fights bacteria by engulfing them in the blood
4. DIt carries oxygen from the lungs to the tissues

A raised serum uric acid is most closely linked to which condition?

1. AHypothyroidism
2. BGout
3. COsteoporosis
4. DIron-deficiency anemia

A patient with hyperkalemia received IV regular insulin with dextrose. Which result must the nurse monitor closely over the next hours?

1. ABlood glucose, because hypoglycemia can occur
2. BSerum calcium, because it falls sharply
3. CHemoglobin, because insulin causes red cell loss
4. DSerum sodium, because it rises quickly

Why do patients with chronic kidney disease often have anemia?

1. AUremic toxins make the bone marrow produce white cells instead of red cells
2. BThe damaged kidneys filter out and destroy red blood cells
3. CHigh potassium in kidney disease breaks down red cells
4. DThe kidneys make less erythropoietin, which drives red cell production

A patient with chronic kidney disease has a magnesium of 3.8 mEq/L (1.9 mmol/L). Which product is the most likely cause?

1. AMagnesium-containing laxatives or antacids
2. BExcess alcohol use over many years
3. CLoop diuretics such as furosemide
4. DProton pump inhibitors taken long term

Which patient's result should the nurse act on first?

1. APlatelets 140 × 10³/µL in a patient with mild chronic liver disease
2. BHemoglobin 6.4 g/dL (64 g/L) with new chest pain and a pulse of 124/min
3. CFerritin 15 ng/mL in a well patient with known iron-deficiency anemia on oral iron
4. DHemoglobin 9.6 g/dL (96 g/L) in a patient with stable chronic kidney disease

A health care worker's hepatitis B tests show: HBsAg negative, anti-HBs positive, anti-HBc positive. What does this mean?

1. ACurrent chronic hepatitis B infection
2. BPast infection that has resolved, with immunity
3. CNot immune and never exposed to the virus
4. DImmunity from vaccination only, never infected