SCI 225 Pathophysiology Midterm Exam Prep 2026/20… 2026/2027 • Verified • Assured Grade A+
✓ VERIFIED • 2026/2027 UPDATE • 100% ACCURATE
SCI 225 Pathophysiology Midterm Exam Prep 2026/2027
UPDATE |Nightingale
ACTUAL EXAM QUESTIONS & VERIFIED ANSWERS
with Clear, Detailed Rationales
Document Type: Exam (Elaborations) / Study Guide
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Rationales
Grade: A+ Assured
ASSURED GRADE A+
Exam (Elaborations) • Detailed Rationales Page 1
,SCI 225 Pathophysiology Midterm Exam Prep 2026/20… 2026/2027 • Verified • Assured Grade A+
Questions & Verified Answers
1. A 55-year-old male with a long history of smoking presents with a cough. A biopsy of his
bronchial epithelium reveals that the normal ciliated columnar epithelium has been replaced
by stratified squamous epithelium. This is an example of:
A. Atrophy
B. Hyperplasia
C. Metaplasia
D. Dysplasia
Answer: C
Rationale: Metaplasia is the reversible replacement of one mature cell type by another, often as an
adaptive response to chronic irritation like smoking. Exam questions often test whether you can pick
the most practical and safe choice for the client in real situations. Focus on what the nurse can actually
do right now. This is important because the nurse must choose the action that keeps the client safest
while still meeting their basic needs. Always think about safety first when answering these questions.
2. Which of the following is the most common cause of cellular injury?
A. Free radical formation
B. Hypoxia
C. Chemical toxicity
D. Genetic defects
Answer: B
Rationale: Hypoxia, or lack of sufficient oxygen, is the single most common cause of cellular injury.
Remembering this point will help you decide the best nursing action when similar questions appear on
the exam. Link the answer to the client’s current condition and risk level. This is important because the
nurse must choose the action that keeps the client safest while still meeting their basic needs. Always
think about safety first when answering these questions.
Exam (Elaborations) • Detailed Rationales Page 2
, SCI 225 Pathophysiology Midterm Exam Prep 2026/20… 2026/2027 • Verified • Assured Grade A+
3. A patient has severe muscle weakness and cardiac dysrhythmias. Laboratory results
show a serum potassium level of 6.2 mEq/L. Which condition does this reflect?
A. Hypokalemia
B. Hyperkalemia
C. Hyponatremia
D. Hypercalcemia
Answer: B
Rationale: Hyperkalemia is defined as a potassium level above 5.0 mEq/L and can cause dangerous
cardiac arrhythmias and muscle weakness. Knowing the reason behind the correct answer makes it
easier to rule out the wrong options quickly. Look for the choice that protects the client and matches
the priority need. This knowledge supports safe care and helps the nurse teach the client and family
clearly and simply. Clear teaching improves cooperation and reduces anxiety.
4. In the context of acid-base balance, how does the body compensate for metabolic
acidosis?
A. Decreasing the respiratory rate to retain CO2
B. Increasing renal excretion of bicarbonate
C. Increasing the respiratory rate to blow off CO2
D. Decreasing renal excretion of hydrogen ions
Answer: C
Rationale: The respiratory system compensates for metabolic acidosis by increasing the rate and
depth of breathing (Kussmaul respirations) to decrease PCO2. This knowledge supports safe care and
helps the nurse teach the client and family clearly and simply. Clear teaching improves cooperation
and reduces anxiety. Exam questions often test whether you can pick the most practical and safe
choice for the client in real situations. Focus on what the nurse can actually do right now.
Exam (Elaborations) • Detailed Rationales Page 3
✓ VERIFIED • 2026/2027 UPDATE • 100% ACCURATE
SCI 225 Pathophysiology Midterm Exam Prep 2026/2027
UPDATE |Nightingale
ACTUAL EXAM QUESTIONS & VERIFIED ANSWERS
with Clear, Detailed Rationales
Document Type: Exam (Elaborations) / Study Guide
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Rationales
Grade: A+ Assured
ASSURED GRADE A+
Exam (Elaborations) • Detailed Rationales Page 1
,SCI 225 Pathophysiology Midterm Exam Prep 2026/20… 2026/2027 • Verified • Assured Grade A+
Questions & Verified Answers
1. A 55-year-old male with a long history of smoking presents with a cough. A biopsy of his
bronchial epithelium reveals that the normal ciliated columnar epithelium has been replaced
by stratified squamous epithelium. This is an example of:
A. Atrophy
B. Hyperplasia
C. Metaplasia
D. Dysplasia
Answer: C
Rationale: Metaplasia is the reversible replacement of one mature cell type by another, often as an
adaptive response to chronic irritation like smoking. Exam questions often test whether you can pick
the most practical and safe choice for the client in real situations. Focus on what the nurse can actually
do right now. This is important because the nurse must choose the action that keeps the client safest
while still meeting their basic needs. Always think about safety first when answering these questions.
2. Which of the following is the most common cause of cellular injury?
A. Free radical formation
B. Hypoxia
C. Chemical toxicity
D. Genetic defects
Answer: B
Rationale: Hypoxia, or lack of sufficient oxygen, is the single most common cause of cellular injury.
Remembering this point will help you decide the best nursing action when similar questions appear on
the exam. Link the answer to the client’s current condition and risk level. This is important because the
nurse must choose the action that keeps the client safest while still meeting their basic needs. Always
think about safety first when answering these questions.
Exam (Elaborations) • Detailed Rationales Page 2
, SCI 225 Pathophysiology Midterm Exam Prep 2026/20… 2026/2027 • Verified • Assured Grade A+
3. A patient has severe muscle weakness and cardiac dysrhythmias. Laboratory results
show a serum potassium level of 6.2 mEq/L. Which condition does this reflect?
A. Hypokalemia
B. Hyperkalemia
C. Hyponatremia
D. Hypercalcemia
Answer: B
Rationale: Hyperkalemia is defined as a potassium level above 5.0 mEq/L and can cause dangerous
cardiac arrhythmias and muscle weakness. Knowing the reason behind the correct answer makes it
easier to rule out the wrong options quickly. Look for the choice that protects the client and matches
the priority need. This knowledge supports safe care and helps the nurse teach the client and family
clearly and simply. Clear teaching improves cooperation and reduces anxiety.
4. In the context of acid-base balance, how does the body compensate for metabolic
acidosis?
A. Decreasing the respiratory rate to retain CO2
B. Increasing renal excretion of bicarbonate
C. Increasing the respiratory rate to blow off CO2
D. Decreasing renal excretion of hydrogen ions
Answer: C
Rationale: The respiratory system compensates for metabolic acidosis by increasing the rate and
depth of breathing (Kussmaul respirations) to decrease PCO2. This knowledge supports safe care and
helps the nurse teach the client and family clearly and simply. Clear teaching improves cooperation
and reduces anxiety. Exam questions often test whether you can pick the most practical and safe
choice for the client in real situations. Focus on what the nurse can actually do right now.
Exam (Elaborations) • Detailed Rationales Page 3
