PN 4003 Variations in Health Midterm
Exam Actual 2026/2027 – 100%
Verified | Detailed Rationales – Pass
Guaranteed – A+ Graded
Content Area Overview
This actual examination reflects the foundational pathophysiology and nursing knowledge required for
success on the PN 4003 Variations in Health Midterm Exam. It is designed to evaluate the student's
understanding of common health variations across the lifespan, pathophysiology of acute and chronic
conditions, nursing interventions for altered health states, pharmacological management of common
disorders, and patient education for self-care management. Questions are structured to assess recall of
key concepts, application of nursing principles to clinical scenarios, and analysis of patient presentations
requiring critical thinking and prioritization. This authentic question bank serves as a comprehensive
resource for practical nursing students demonstrating mastery of variations in health content for the
2026/2027 academic year.
Section 1: Fluid, Electrolyte, and Acid-Base Imbalances (Questions 1–8)
Q1. A patient presents with a blood pH of 7.25, PaCO₂ of 40 mmHg, and HCO₃⁻ of 18 mEq/L. Which acid-
base imbalance is MOST likely present?
A. Respiratory acidosis
B. Respiratory alkalosis
C. Metabolic acidosis
D. Metabolic alkalosis
Rationale: The best answer is C. Metabolic acidosis is characterized by a low blood pH (<7.35) with a low
bicarbonate level (<22 mEq/L), while the PaCO₂ remains normal or compensatory. This patient's pH of
7.25 and HCO₃⁻ of 18 mEq/L fit this pattern exactly. Respiratory acidosis would show elevated PaCO₂,
respiratory alkalosis would show high pH and low PaCO₂, and metabolic alkalosis would show high pH
and high HCO₃⁻.
,Correct Answer: C
Q2. A patient has been vomiting excessively for 48 hours. Their blood gas shows pH 7.50, PaCO₂ 48
mmHg, and HCO₃⁻ 35 mEq/L. Which acid-base imbalance is present?
A. Respiratory acidosis
B. Metabolic acidosis
C. Metabolic alkalosis
D. Respiratory alkalosis
Rationale: The best answer is C. Metabolic alkalosis presents with elevated pH (>7.45) and elevated
bicarbonate (>28 mEq/L), which matches this patient's values. The elevated PaCO₂ represents
respiratory compensation as the body tries to retain CO₂ to lower pH. Excessive vomiting causes loss of
gastric acid (HCl), leading to metabolic alkalosis. The other imbalances don't match this pattern of high
pH with high bicarbonate.
Correct Answer: C
Q3. A patient's laboratory results show a sodium level of 128 mEq/L. Which condition is this patient
MOST likely experiencing?
A. Hypernatremia
B. Hyponatremia
C. Normal sodium level
D. Hyperkalemia
Rationale: The best answer is B. A sodium level of 128 mEq/L is below the normal range of 135–145
mEq/L, indicating hyponatremia. This can result from excessive fluid intake, fluid loss with salt depletion,
or syndrome of inappropriate antidiuretic hormone (SIADH). Hypernatremia would be above 145 mEq/L,
and hyperkalemia refers to elevated potassium, not sodium.
Correct Answer: B
Q4. A patient with heart failure is receiving furosemide (Lasix). Which electrolyte imbalance should the
practical nurse monitor for MOST closely?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypercalcemia
, Rationale: The best answer is B. Furosemide is a loop diuretic that causes potassium wasting in the
urine, placing patients at significant risk for hypokalemia (low potassium). The practical nurse should
monitor potassium levels regularly and watch for signs like muscle weakness, cardiac arrhythmias, and
fatigue. Furosemide does not typically cause hyperkalemia, hypernatremia, or hypercalcemia.
Correct Answer: B
Q5. A patient's blood gas shows pH 7.30, PaCO₂ 55 mmHg, and HCO₃⁻ 24 mEq/L. Which acid-base
imbalance is present, and what is the likely cause?
A. Metabolic acidosis caused by kidney failure
B. Respiratory acidosis caused by hypoventilation
C. Metabolic alkalosis caused by vomiting
D. Respiratory alkalosis caused by hyperventilation
Rationale: The best answer is B. Respiratory acidosis is characterized by low pH (<7.35) with elevated
PaCO₂ (>45 mmHg) due to inadequate excretion of CO₂ from hypoventilation. The normal HCO₃⁻
indicates this is an acute respiratory problem without metabolic compensation. Kidney failure causes
metabolic acidosis with low bicarbonate, vomiting causes metabolic alkalosis, and hyperventilation
causes respiratory alkalosis with low PaCO₂.
Correct Answer: B
Q6. A patient has a potassium level of 2.8 mEq/L. Which clinical manifestation should the practical nurse
expect?
A. Bradycardia and peaked T waves on ECG
B. Muscle weakness, cardiac arrhythmias, and flattened T waves
C. Hypertension and decreased urine output
D. Hyperactive reflexes and tremors
Rationale: The best answer is B. Hypokalemia (potassium <3.5 mEq/L) causes muscle weakness, fatigue,
cardiac arrhythmias, and characteristic ECG changes including flattened T waves, ST depression, and U
waves. Bradycardia and peaked T waves are signs of hyperkalemia, not hypokalemia. Hypertension and
decreased urine output are not typical of low potassium, and hyperactive reflexes are more associated
with hypercalcemia or neurological conditions.
Correct Answer: B
Exam Actual 2026/2027 – 100%
Verified | Detailed Rationales – Pass
Guaranteed – A+ Graded
Content Area Overview
This actual examination reflects the foundational pathophysiology and nursing knowledge required for
success on the PN 4003 Variations in Health Midterm Exam. It is designed to evaluate the student's
understanding of common health variations across the lifespan, pathophysiology of acute and chronic
conditions, nursing interventions for altered health states, pharmacological management of common
disorders, and patient education for self-care management. Questions are structured to assess recall of
key concepts, application of nursing principles to clinical scenarios, and analysis of patient presentations
requiring critical thinking and prioritization. This authentic question bank serves as a comprehensive
resource for practical nursing students demonstrating mastery of variations in health content for the
2026/2027 academic year.
Section 1: Fluid, Electrolyte, and Acid-Base Imbalances (Questions 1–8)
Q1. A patient presents with a blood pH of 7.25, PaCO₂ of 40 mmHg, and HCO₃⁻ of 18 mEq/L. Which acid-
base imbalance is MOST likely present?
A. Respiratory acidosis
B. Respiratory alkalosis
C. Metabolic acidosis
D. Metabolic alkalosis
Rationale: The best answer is C. Metabolic acidosis is characterized by a low blood pH (<7.35) with a low
bicarbonate level (<22 mEq/L), while the PaCO₂ remains normal or compensatory. This patient's pH of
7.25 and HCO₃⁻ of 18 mEq/L fit this pattern exactly. Respiratory acidosis would show elevated PaCO₂,
respiratory alkalosis would show high pH and low PaCO₂, and metabolic alkalosis would show high pH
and high HCO₃⁻.
,Correct Answer: C
Q2. A patient has been vomiting excessively for 48 hours. Their blood gas shows pH 7.50, PaCO₂ 48
mmHg, and HCO₃⁻ 35 mEq/L. Which acid-base imbalance is present?
A. Respiratory acidosis
B. Metabolic acidosis
C. Metabolic alkalosis
D. Respiratory alkalosis
Rationale: The best answer is C. Metabolic alkalosis presents with elevated pH (>7.45) and elevated
bicarbonate (>28 mEq/L), which matches this patient's values. The elevated PaCO₂ represents
respiratory compensation as the body tries to retain CO₂ to lower pH. Excessive vomiting causes loss of
gastric acid (HCl), leading to metabolic alkalosis. The other imbalances don't match this pattern of high
pH with high bicarbonate.
Correct Answer: C
Q3. A patient's laboratory results show a sodium level of 128 mEq/L. Which condition is this patient
MOST likely experiencing?
A. Hypernatremia
B. Hyponatremia
C. Normal sodium level
D. Hyperkalemia
Rationale: The best answer is B. A sodium level of 128 mEq/L is below the normal range of 135–145
mEq/L, indicating hyponatremia. This can result from excessive fluid intake, fluid loss with salt depletion,
or syndrome of inappropriate antidiuretic hormone (SIADH). Hypernatremia would be above 145 mEq/L,
and hyperkalemia refers to elevated potassium, not sodium.
Correct Answer: B
Q4. A patient with heart failure is receiving furosemide (Lasix). Which electrolyte imbalance should the
practical nurse monitor for MOST closely?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypercalcemia
, Rationale: The best answer is B. Furosemide is a loop diuretic that causes potassium wasting in the
urine, placing patients at significant risk for hypokalemia (low potassium). The practical nurse should
monitor potassium levels regularly and watch for signs like muscle weakness, cardiac arrhythmias, and
fatigue. Furosemide does not typically cause hyperkalemia, hypernatremia, or hypercalcemia.
Correct Answer: B
Q5. A patient's blood gas shows pH 7.30, PaCO₂ 55 mmHg, and HCO₃⁻ 24 mEq/L. Which acid-base
imbalance is present, and what is the likely cause?
A. Metabolic acidosis caused by kidney failure
B. Respiratory acidosis caused by hypoventilation
C. Metabolic alkalosis caused by vomiting
D. Respiratory alkalosis caused by hyperventilation
Rationale: The best answer is B. Respiratory acidosis is characterized by low pH (<7.35) with elevated
PaCO₂ (>45 mmHg) due to inadequate excretion of CO₂ from hypoventilation. The normal HCO₃⁻
indicates this is an acute respiratory problem without metabolic compensation. Kidney failure causes
metabolic acidosis with low bicarbonate, vomiting causes metabolic alkalosis, and hyperventilation
causes respiratory alkalosis with low PaCO₂.
Correct Answer: B
Q6. A patient has a potassium level of 2.8 mEq/L. Which clinical manifestation should the practical nurse
expect?
A. Bradycardia and peaked T waves on ECG
B. Muscle weakness, cardiac arrhythmias, and flattened T waves
C. Hypertension and decreased urine output
D. Hyperactive reflexes and tremors
Rationale: The best answer is B. Hypokalemia (potassium <3.5 mEq/L) causes muscle weakness, fatigue,
cardiac arrhythmias, and characteristic ECG changes including flattened T waves, ST depression, and U
waves. Bradycardia and peaked T waves are signs of hyperkalemia, not hypokalemia. Hypertension and
decreased urine output are not typical of low potassium, and hyperactive reflexes are more associated
with hypercalcemia or neurological conditions.
Correct Answer: B
