1
Comprehensive Exam Bank on Nursing Fluid
and Electrolyte Balance: Homeostasis, IV
Therapy, and Clinical Interventions
Table of Contents
Topic 1: Fundamentals of Fluid and Electrolyte Balance..................................2
Topic 2: Electrolyte Imbalances and Clinical Manifestations............................9
Topic 3: IV Fluid Therapy and Clinical Decision-Making..................................17
Topic 4: Acid-Base Balance and Clinical Implications.....................................25
Topic 5: Special Populations and Fluid-Electrolyte Management....................33
Topic 6: Pathophysiology and Clinical Implications of Fluid and Electrolyte
Disorders........................................................................................................41
Topic 7: IV Therapy, Fluid Types, and Clinical Application..............................49
Topic 8: Fluid Volume Imbalances and Complications....................................56
Topic 9: IV Therapy Techniques and Complication Management....................64
Topic 10: Complex Fluid and Electrolyte Scenarios and Emergency
Management..................................................................................................72
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Topic 1: Fundamentals of Fluid and
Electrolyte Balance
Questions 1–20
1. Which electrolyte is the major intracellular cation responsible for
maintaining cell function?
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
Correct Answer: B. Potassium
Rationale: Potassium is the most abundant intracellular cation and is
essential for cell metabolism, transmission of nerve impulses, and muscle
contraction, especially in cardiac tissue.
2. A patient with severe diarrhea is at risk for which acid-base imbalance?
A. Metabolic alkalosis
B. Metabolic acidosis
C. Respiratory alkalosis
D. Respiratory acidosis
Correct Answer: B. Metabolic acidosis
Rationale: Loss of bicarbonate through diarrhea causes a decrease in the
body’s pH, leading to metabolic acidosis.
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3. Which of the following is the best indicator of fluid volume status in a
critically ill patient?
A. Blood pressure
B. Daily weight
C. Urine color
D. Skin turgor
Correct Answer: B. Daily weight
Rationale: Daily weight is the most accurate non-invasive measure of fluid
balance; a change of 1 kg reflects approximately 1 liter of fluid gain or loss.
4. Which IV fluid is isotonic and commonly used for fluid resuscitation?
A. 0.45% NaCl
B. 0.9% NaCl
C. 5% Dextrose in water
D. 3% NaCl
Correct Answer: B. 0.9% NaCl
Rationale: Normal saline (0.9% NaCl) is isotonic and remains in the
intravascular compartment, making it effective for fluid volume replacement.
5. Hyponatremia can cause which of the following neurologic symptoms?
A. Hypertension
B. Flushed skin
C. Seizures
D. Bradycardia
Correct Answer: C. Seizures
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Rationale: Hyponatremia causes cellular swelling, particularly in the brain,
which can result in increased intracranial pressure and seizures.
6. Which hormone primarily regulates sodium and potassium levels?
A. ADH
B. Aldosterone
C. Insulin
D. Cortisol
Correct Answer: B. Aldosterone
Rationale: Aldosterone promotes sodium reabsorption and potassium
excretion in the kidneys, playing a key role in fluid and electrolyte balance.
7. A patient has a potassium level of 6.2 mEq/L. Which nursing intervention is
a priority?
A. Administer potassium chloride
B. Place patient on cardiac monitor
C. Encourage intake of bananas
D. Start a high-protein diet
Correct Answer: B. Place patient on cardiac monitor
Rationale: Hyperkalemia can cause life-threatening cardiac arrhythmias, and
continuous ECG monitoring is essential for early detection.
8. Which electrolyte imbalance is most commonly associated with
hypoparathyroidism?
A. Hypocalcemia
B. Hypernatremia
Comprehensive Exam Bank on Nursing Fluid
and Electrolyte Balance: Homeostasis, IV
Therapy, and Clinical Interventions
Table of Contents
Topic 1: Fundamentals of Fluid and Electrolyte Balance..................................2
Topic 2: Electrolyte Imbalances and Clinical Manifestations............................9
Topic 3: IV Fluid Therapy and Clinical Decision-Making..................................17
Topic 4: Acid-Base Balance and Clinical Implications.....................................25
Topic 5: Special Populations and Fluid-Electrolyte Management....................33
Topic 6: Pathophysiology and Clinical Implications of Fluid and Electrolyte
Disorders........................................................................................................41
Topic 7: IV Therapy, Fluid Types, and Clinical Application..............................49
Topic 8: Fluid Volume Imbalances and Complications....................................56
Topic 9: IV Therapy Techniques and Complication Management....................64
Topic 10: Complex Fluid and Electrolyte Scenarios and Emergency
Management..................................................................................................72
, 2
Topic 1: Fundamentals of Fluid and
Electrolyte Balance
Questions 1–20
1. Which electrolyte is the major intracellular cation responsible for
maintaining cell function?
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
Correct Answer: B. Potassium
Rationale: Potassium is the most abundant intracellular cation and is
essential for cell metabolism, transmission of nerve impulses, and muscle
contraction, especially in cardiac tissue.
2. A patient with severe diarrhea is at risk for which acid-base imbalance?
A. Metabolic alkalosis
B. Metabolic acidosis
C. Respiratory alkalosis
D. Respiratory acidosis
Correct Answer: B. Metabolic acidosis
Rationale: Loss of bicarbonate through diarrhea causes a decrease in the
body’s pH, leading to metabolic acidosis.
, 3
3. Which of the following is the best indicator of fluid volume status in a
critically ill patient?
A. Blood pressure
B. Daily weight
C. Urine color
D. Skin turgor
Correct Answer: B. Daily weight
Rationale: Daily weight is the most accurate non-invasive measure of fluid
balance; a change of 1 kg reflects approximately 1 liter of fluid gain or loss.
4. Which IV fluid is isotonic and commonly used for fluid resuscitation?
A. 0.45% NaCl
B. 0.9% NaCl
C. 5% Dextrose in water
D. 3% NaCl
Correct Answer: B. 0.9% NaCl
Rationale: Normal saline (0.9% NaCl) is isotonic and remains in the
intravascular compartment, making it effective for fluid volume replacement.
5. Hyponatremia can cause which of the following neurologic symptoms?
A. Hypertension
B. Flushed skin
C. Seizures
D. Bradycardia
Correct Answer: C. Seizures
, 4
Rationale: Hyponatremia causes cellular swelling, particularly in the brain,
which can result in increased intracranial pressure and seizures.
6. Which hormone primarily regulates sodium and potassium levels?
A. ADH
B. Aldosterone
C. Insulin
D. Cortisol
Correct Answer: B. Aldosterone
Rationale: Aldosterone promotes sodium reabsorption and potassium
excretion in the kidneys, playing a key role in fluid and electrolyte balance.
7. A patient has a potassium level of 6.2 mEq/L. Which nursing intervention is
a priority?
A. Administer potassium chloride
B. Place patient on cardiac monitor
C. Encourage intake of bananas
D. Start a high-protein diet
Correct Answer: B. Place patient on cardiac monitor
Rationale: Hyperkalemia can cause life-threatening cardiac arrhythmias, and
continuous ECG monitoring is essential for early detection.
8. Which electrolyte imbalance is most commonly associated with
hypoparathyroidism?
A. Hypocalcemia
B. Hypernatremia
