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Free Practice Quiz Question List

3 Electrolytes, Renal Function, and Fluid Balance Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Electrolytes, Renal Function, and Fluid Balance, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: A blood sodium concentration directly measures the body’s total amount of sodium.

  1. A

    True

  2. B

    False

02
True or false
1 point

True or false: IV potassium may be given by IV push when a patient’s potassium is critically low.

  1. A

    True

  2. B

    False

03
True or false
1 point

True or false: High phosphate is uncommon in advanced kidney disease and does not contribute to calcium or bone-mineral problems.

  1. A

    True

  2. B

    False

04
Choose one
1 point

A patient has an elevated BUN after several days of poor fluid intake and a high-protein diet. Which interpretation is most appropriate?

  1. A

    The result by itself confirms reduced kidney filtration.

  2. B

    The result needs interpretation alongside hydration, diet, and other clinical information.

  3. C

    The result is unaffected by hydration or protein intake.

  4. D

    The result rules out reduced kidney clearance.

05
Fill in the blank
1 point

Hypernatremia usually reflects a or impaired access to water.

06
Written response
1 point

A patient’s weight increases by 2.3 kg. Using the approximate relationship that 1 kg of body-weight change corresponds to 1 L of fluid, what fluid gain does this suggest?

07
Choose one
1 point

A potassium result is high, but the sample is hemolyzed. The patient has no symptoms and the ECG is unchanged. What is the most appropriate response?

  1. A

    Arrange a repeat sample according to policy and continue assessing the patient.

  2. B

    Ignore the result because hemolysis always explains an elevated potassium.

  3. C

    Give IV potassium immediately to prevent a further drop.

  4. D

    Wait for symptoms to develop before taking any action.

08
Choose all
1 point

A patient is being assessed for possible fluid overload. Select all findings that support this concern.

  1. A

    Increasing weight

  2. B

    Edema

  3. C

    Jugular venous distension

  4. D

    Dry mucous membranes

  5. E

    Crackles on lung assessment

  6. F

    New or worsening shortness of breath

09
Fill in the blank
1 point

Magnesium deficiency can make difficult to correct.

10
Written response
1 point

A 60 kg adult produces 24 mL of urine in one hour. What is the urine-output rate in mL/kg/hour?

11
Choose one
1 point

A patient’s sodium is 121 mEq/L and the patient becomes confused. What is the priority nursing response?

  1. A

    Give free water immediately without an order.

  2. B

    Assess safety, airway, and neurologic status, institute precautions, and promptly escalate the change.

  3. C

    Wait to see whether the confusion resolves before assessing the patient.

  4. D

    Independently administer hypertonic saline.

12
Choose all
1 point

Which scenarios meet a stated criterion for possible acute kidney injury? Select all that apply.

  1. A

    Creatinine rises by 0.3 mg/dL within 48 hours.

  2. B

    Creatinine rises to 1.5 times baseline within 7 days.

  3. C

    Urine output is below 0.5 mL/kg/hour for at least 6 hours.

  4. D

    BUN rises, with no stated creatinine or urine-output change.

  5. E

    Urine output is 0.6 mL/kg/hour for 6 hours.

13
Choose one
1 point

Which group of findings is most consistent with high calcium?

  1. A

    Tingling, tetany, and a prolonged QT interval

  2. B

    Tremor, hyperreflexia, and respiratory depression

  3. C

    Constipation, thirst, frequent urination, and weakness

  4. D

    Peaked T waves and a widened QRS complex

14
Open ended
1 point

Explain how eGFR and urine albumin-to-creatinine ratio can inform assessment for chronic kidney disease. Include the findings that are concerning and why persistence over time matters.

15
Choose one
1 point

A patient has an abnormal serum sodium concentration. Which interpretation best describes what the concentration reflects?

  1. A

    It directly measures the total amount of sodium stored in the body.

  2. B

    It reflects the balance of water relative to sodium.

  3. C

    It measures how much sodium the kidneys excrete each hour.

  4. D

    It indicates the amount of sodium bound to blood proteins.

16
Choose one
1 point

Which group of findings is most consistent with low calcium?

  1. A

    Thirst, frequent urination, and constipation

  2. B

    Diminished reflexes, hypotension, and bradycardia

  3. C

    Tingling, muscle cramps, and possible tetany

  4. D

    Peaked T waves and a widened QRS complex

17
Written response
1 point

A patient's body weight changes by 1 kg. Approximately what volume of fluid change does this correspond to? Enter the value in liters.

18
Choose one
1 point

A patient's potassium remains low despite prescribed replacement, and the magnesium result is also low. Which relationship is important to recognize?

  1. A

    Low magnesium can contribute to potassium that remains low despite replacement.

  2. B

    Low potassium prevents magnesium from being absorbed from the gastrointestinal tract.

  3. C

    Low magnesium makes potassium results unreliable, so they should be disregarded.

  4. D

    Low magnesium means potassium replacement should always be stopped.

19
Choose one
1 point

Which statement best describes how eGFR and evidence of kidney damage are used when considering chronic kidney disease?

  1. A

    Any single eGFR below 90 mL/min/1.73 m² confirms CKD.

  2. B

    A single elevated BUN confirms CKD if the patient has no symptoms.

  3. C

    A single creatinine within the reference range rules out CKD.

  4. D

    Persistent eGFR below 60 mL/min/1.73 m² or persistent evidence of kidney damage can indicate CKD and requires interpretation over time.

20
Written response
1 point

An adult weighing 60 kg produces 24 mL of urine in one hour. What is the urine-output rate per kilogram? Enter the value in mL/kg/hour.