Lab values & electrolytes worksheet with answers

Where does most of the ammonia in the blood come from, and which organ removes it?

1. AFat breakdown in adipose tissue; removed by the lungs
2. BProtein breakdown by gut bacteria; removed by the liver
3. CGlucose breakdown in muscle; removed by the pancreas
4. DRed cell breakdown in the spleen; removed by the skin

A laboratory flags a result as high using its own reference range, but the value is inside the range in your textbook. Which range should you use for this patient?

1. AThe textbook range, because textbooks are the national standard
2. BThe range used at the hospital where you trained
3. CThe reference range of the laboratory that ran the test
4. DThe widest range that you can find in any source

In a healthy adult, the CSF glucose is usually about what proportion of the blood glucose?

1. AAbout double (200%)
2. BAbout one tenth (10%)
3. CAbout two-thirds (60%)
4. DExactly the same (100%)

A blood sample drawn just after a patient ate a fatty meal is reported as "lipemic." What does this mean for the results?

1. AHigh fat in the sample may interfere with some test results
2. BThe sample was contaminated by an IV fluid with dextrose
3. CThe results are more accurate than in a fasting sample
4. DThe sample shows the patient has diabetic ketoacidosis

A conscious patient with a blood glucose of 54 mg/dL (3.0 mmol/L) has taken 15 g of fast-acting carbohydrate. When should the glucose be rechecked?

1. AAt the next meal
2. BAfter about 2 hours
3. CAfter about 15 minutes
4. DThe next morning

A patient takes high-dose furosemide. Besides potassium, which electrolyte is most commonly lowered?

1. AMagnesium
2. BUric acid
3. CPhosphate
4. DSodium bicarbonate

Ten minutes into a red cell transfusion, a patient develops fever, chills, low back pain and dark urine. After stopping the transfusion, what should the nurse do next?

1. AFlush the remaining blood through the line with the IV fluid to finish it
2. BKeep the IV open with normal saline using new tubing and call the provider
3. CRestart the transfusion more slowly after giving an antipyretic drug
4. DDiscard the blood bag and tubing in the clinical waste to stop exposure

A healthy woman at 10 weeks of pregnancy has a slightly low TSH with a normal free T₄ and no symptoms. What is the most likely explanation?

1. AhCG stimulates the thyroid in early pregnancy
2. BThe result shows severe primary hypothyroidism
3. CShe has developed Graves disease in pregnancy
4. DShe has pituitary failure from the pregnancy