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NURS 6501 Advanced Pathophysiology Midterm Actual
Exam 2026/2027 | Walden University Complete Practice
Exam | Questions with Correct Detailed Answers | Pass
Guaranteed - A+ Graded
Section I: Cellular Function, Adaptation, & Injury (Questions 1-15)
1. A runner has depleted all the oxygen available for muscle energy. Which of the following will
facilitate continued muscle performance?
• A) Aerobic glycolysis
• B) Anaerobic glycolysis
• C) Gluconeogenesis
• D) Lipolysis
Answer: B) Anaerobic glycolysis
Rationale: Anaerobic glycolysis breaks down glucose without oxygen, producing ATP and lactic acid
to sustain muscle activity during high-intensity exercise when oxygen is limited .
2. What causes the rapid change in the resting membrane potential that initiates an action
potential?
• A) Potassium channels open, and potassium exits the cell
• B) Chloride gates open, and chloride enters the cell
• C) Sodium gates open, and sodium rushes into the cell
• D) Calcium channels open, and calcium enters the cell
Answer: C) Sodium gates open, and sodium rushes into the cell
Rationale: Rapid depolarization occurs when voltage-gated sodium channels open, allowing sodium
ions to flood into the cell, making the inside more positive .
3. Sodium and water accumulation in an injured cell are a direct result of:
• A) Increased ATP production
• B) Decreased ATP production
• C) Enhanced protein synthesis
• D) Activation of sodium-potassium pumps
Answer: B) Decreased ATP production
Rationale: Decreased ATP leads to failure of the sodium-potassium pump, causing intracellular
sodium accumulation and subsequent water influx, resulting in cellular swelling .
4. The early dilation (swelling) of the cell's endoplasmic reticulum results in:
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• A) Increased protein synthesis
• B) Reduced protein synthesis
• C) Enhanced ATP production
• D) Improved cellular metabolism
Answer: B) Reduced protein synthesis
Rationale: Dilation of the endoplasmic reticulum detaches ribosomes, which slows or halts protein
synthesis, contributing to cellular dysfunction during injury .
5. A 55-year-old patient with chronic, poorly controlled hypertension presents with left ventricular
hypertrophy. Which cellular adaptation mechanism is primarily responsible for the increase in
myocardial mass?
• A) Hyperplasia; increased mitotic signaling via growth factors.
• B) Hypertrophy; upregulation of protein synthesis and structural protein production.
• C) Metaplasia; reprogramming of pluripotent stem cells to muscle tissue.
• D) Dysplasia; disorganized proliferation due to excessive sympathetic stimulation.
Answer: B) Hypertrophy; upregulation of protein synthesis and structural protein production.
Rationale: Hypertrophy is the increase in cell size and functional tissue mass without an increase in
cell number, driven by the upregulation of protein synthesis. In the heart, chronic pressure overload
(like hypertension) necessitates greater contractile force .
6. A biopsy of a chronically inflamed wound shows cells with enlarged nuclei and prominent
nucleoli. This change is best described as:
• A) Metaplasia
• B) Dysplasia
• C) Hypertrophy
• D) Hyperplasia
Answer: B) Dysplasia
Rationale: Dysplasia is characterized by abnormal changes in cell size, shape, and organization,
including enlarged nuclei and prominent nucleoli. It is potentially reversible but considered a
premalignant change .
7. Which is an example of physiologic hypertrophy?
• A) Left ventricular enlargement in hypertension
• B) Uterine enlargement during pregnancy
• C) Enlarged liver in alcoholism
• D) Cardiac enlargement in aortic stenosis
Answer: B) Uterine enlargement during pregnancy
Rationale: Uterine hypertrophy during pregnancy is a normal adaptive response to increased
hormonal stimulation, whereas the others are pathologic .
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8. Which statement is correct regarding pathologic hyperplasia?
• A) Produces abnormal proliferation of abnormal cells
• B) Is an adaptive mechanism that enables organ regeneration
• C) Increases cell size
• D) May occur in response to growth factors
Answer: D) May occur in response to growth factors
Rationale: Pathologic hyperplasia is an abnormal increase in the number of normal cells, often
driven by excessive hormonal or growth factor stimulation, such as endometrial hyperplasia from
estrogen excess .
9. A patient has a mutation in the CFTR gene. Which cellular process is directly affected?
• A) Chloride ion transport
• B) Sodium reabsorption
• C) Potassium channel function
• D) Calcium signaling
Answer: A) Chloride ion transport
Rationale: The CFTR gene encodes a chloride channel. The mutation leads to defective chloride
transport, resulting in thick secretions in the lungs, pancreas, and other organs .
10. A mutation in the p53 gene would most likely result in:
• A) Increased DNA repair
• B) Failure of cell cycle arrest after DNA damage
• C) Enhanced apoptosis
• D) Decreased angiogenesis
Answer: B) Failure of cell cycle arrest after DNA damage
Rationale: Tumor suppressor genes (e.g., p53, Rb) normally inhibit the cell cycle and allow for DNA
repair. Loss of function removes these growth restraints, allowing damaged cells to proliferate .
11. Reperfusion injury is primarily mediated by:
• A) Decreased oxygen delivery
• B) Generation of reactive oxygen species
• C) Increased ATP production
• D) Activation of lysosomal enzymes only
Answer: B) Generation of reactive oxygen species
Rationale: Reperfusion generates reactive oxygen species (ROS) from mitochondria and xanthine
oxidase, causing additional cellular damage beyond the initial ischemic injury .
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12. A 45-year-old patient with chronic alcoholism is admitted with confusion and ataxia. Serum
magnesium is 1.0 mg/dL (normal 1.8-2.5). Which cellular process is most directly impaired?
• A) Sodium-potassium pump function
• B) ATP production in mitochondria
• C) DNA replication in the nucleus
• D) Ribosomal protein synthesis
Answer: B) ATP production in mitochondria
Rationale: Magnesium is a cofactor for ATP production. Hypomagnesemia impairs oxidative
phosphorylation and mitochondrial function, leading to neurological symptoms .
13. A cell is placed in a hypotonic solution. What will occur?
• A) Cell shrinks
• B) Cell swells and may burst
• C) No change
• D) Cell undergoes apoptosis
Answer: B) Cell swells and may burst
Rationale: Water moves into the cell down its osmotic gradient, causing swelling and possible lysis .
14. A patient with cirrhosis has decreased synthesis of plasma proteins. Which pathophysiologic
process contributes to edema formation?
• A) Increased hydrostatic pressure
• B) Decreased plasma oncotic pressure
• C) Increased capillary permeability
• D) Lymphatic obstruction
Answer: B) Decreased plasma oncotic pressure
Rationale: Oncotic pressure (colloid osmotic pressure) is primarily determined by plasma proteins.
Decreased protein synthesis in cirrhosis reduces plasma oncotic pressure, leading to fluid shifts into
interstitial spaces .
15. The nurse would be correct in identifying the predominant extracellular cation as:
• A) Potassium
• B) Magnesium
• C) Sodium
• D) Calcium
Answer: C) Sodium
Rationale: Sodium (Na+) is the primary extracellular cation, while potassium (K+) is the predominant
intracellular cation .
NURS 6501 Advanced Pathophysiology Midterm Actual
Exam 2026/2027 | Walden University Complete Practice
Exam | Questions with Correct Detailed Answers | Pass
Guaranteed - A+ Graded
Section I: Cellular Function, Adaptation, & Injury (Questions 1-15)
1. A runner has depleted all the oxygen available for muscle energy. Which of the following will
facilitate continued muscle performance?
• A) Aerobic glycolysis
• B) Anaerobic glycolysis
• C) Gluconeogenesis
• D) Lipolysis
Answer: B) Anaerobic glycolysis
Rationale: Anaerobic glycolysis breaks down glucose without oxygen, producing ATP and lactic acid
to sustain muscle activity during high-intensity exercise when oxygen is limited .
2. What causes the rapid change in the resting membrane potential that initiates an action
potential?
• A) Potassium channels open, and potassium exits the cell
• B) Chloride gates open, and chloride enters the cell
• C) Sodium gates open, and sodium rushes into the cell
• D) Calcium channels open, and calcium enters the cell
Answer: C) Sodium gates open, and sodium rushes into the cell
Rationale: Rapid depolarization occurs when voltage-gated sodium channels open, allowing sodium
ions to flood into the cell, making the inside more positive .
3. Sodium and water accumulation in an injured cell are a direct result of:
• A) Increased ATP production
• B) Decreased ATP production
• C) Enhanced protein synthesis
• D) Activation of sodium-potassium pumps
Answer: B) Decreased ATP production
Rationale: Decreased ATP leads to failure of the sodium-potassium pump, causing intracellular
sodium accumulation and subsequent water influx, resulting in cellular swelling .
4. The early dilation (swelling) of the cell's endoplasmic reticulum results in:
,2
• A) Increased protein synthesis
• B) Reduced protein synthesis
• C) Enhanced ATP production
• D) Improved cellular metabolism
Answer: B) Reduced protein synthesis
Rationale: Dilation of the endoplasmic reticulum detaches ribosomes, which slows or halts protein
synthesis, contributing to cellular dysfunction during injury .
5. A 55-year-old patient with chronic, poorly controlled hypertension presents with left ventricular
hypertrophy. Which cellular adaptation mechanism is primarily responsible for the increase in
myocardial mass?
• A) Hyperplasia; increased mitotic signaling via growth factors.
• B) Hypertrophy; upregulation of protein synthesis and structural protein production.
• C) Metaplasia; reprogramming of pluripotent stem cells to muscle tissue.
• D) Dysplasia; disorganized proliferation due to excessive sympathetic stimulation.
Answer: B) Hypertrophy; upregulation of protein synthesis and structural protein production.
Rationale: Hypertrophy is the increase in cell size and functional tissue mass without an increase in
cell number, driven by the upregulation of protein synthesis. In the heart, chronic pressure overload
(like hypertension) necessitates greater contractile force .
6. A biopsy of a chronically inflamed wound shows cells with enlarged nuclei and prominent
nucleoli. This change is best described as:
• A) Metaplasia
• B) Dysplasia
• C) Hypertrophy
• D) Hyperplasia
Answer: B) Dysplasia
Rationale: Dysplasia is characterized by abnormal changes in cell size, shape, and organization,
including enlarged nuclei and prominent nucleoli. It is potentially reversible but considered a
premalignant change .
7. Which is an example of physiologic hypertrophy?
• A) Left ventricular enlargement in hypertension
• B) Uterine enlargement during pregnancy
• C) Enlarged liver in alcoholism
• D) Cardiac enlargement in aortic stenosis
Answer: B) Uterine enlargement during pregnancy
Rationale: Uterine hypertrophy during pregnancy is a normal adaptive response to increased
hormonal stimulation, whereas the others are pathologic .
,3
8. Which statement is correct regarding pathologic hyperplasia?
• A) Produces abnormal proliferation of abnormal cells
• B) Is an adaptive mechanism that enables organ regeneration
• C) Increases cell size
• D) May occur in response to growth factors
Answer: D) May occur in response to growth factors
Rationale: Pathologic hyperplasia is an abnormal increase in the number of normal cells, often
driven by excessive hormonal or growth factor stimulation, such as endometrial hyperplasia from
estrogen excess .
9. A patient has a mutation in the CFTR gene. Which cellular process is directly affected?
• A) Chloride ion transport
• B) Sodium reabsorption
• C) Potassium channel function
• D) Calcium signaling
Answer: A) Chloride ion transport
Rationale: The CFTR gene encodes a chloride channel. The mutation leads to defective chloride
transport, resulting in thick secretions in the lungs, pancreas, and other organs .
10. A mutation in the p53 gene would most likely result in:
• A) Increased DNA repair
• B) Failure of cell cycle arrest after DNA damage
• C) Enhanced apoptosis
• D) Decreased angiogenesis
Answer: B) Failure of cell cycle arrest after DNA damage
Rationale: Tumor suppressor genes (e.g., p53, Rb) normally inhibit the cell cycle and allow for DNA
repair. Loss of function removes these growth restraints, allowing damaged cells to proliferate .
11. Reperfusion injury is primarily mediated by:
• A) Decreased oxygen delivery
• B) Generation of reactive oxygen species
• C) Increased ATP production
• D) Activation of lysosomal enzymes only
Answer: B) Generation of reactive oxygen species
Rationale: Reperfusion generates reactive oxygen species (ROS) from mitochondria and xanthine
oxidase, causing additional cellular damage beyond the initial ischemic injury .
, 4
12. A 45-year-old patient with chronic alcoholism is admitted with confusion and ataxia. Serum
magnesium is 1.0 mg/dL (normal 1.8-2.5). Which cellular process is most directly impaired?
• A) Sodium-potassium pump function
• B) ATP production in mitochondria
• C) DNA replication in the nucleus
• D) Ribosomal protein synthesis
Answer: B) ATP production in mitochondria
Rationale: Magnesium is a cofactor for ATP production. Hypomagnesemia impairs oxidative
phosphorylation and mitochondrial function, leading to neurological symptoms .
13. A cell is placed in a hypotonic solution. What will occur?
• A) Cell shrinks
• B) Cell swells and may burst
• C) No change
• D) Cell undergoes apoptosis
Answer: B) Cell swells and may burst
Rationale: Water moves into the cell down its osmotic gradient, causing swelling and possible lysis .
14. A patient with cirrhosis has decreased synthesis of plasma proteins. Which pathophysiologic
process contributes to edema formation?
• A) Increased hydrostatic pressure
• B) Decreased plasma oncotic pressure
• C) Increased capillary permeability
• D) Lymphatic obstruction
Answer: B) Decreased plasma oncotic pressure
Rationale: Oncotic pressure (colloid osmotic pressure) is primarily determined by plasma proteins.
Decreased protein synthesis in cirrhosis reduces plasma oncotic pressure, leading to fluid shifts into
interstitial spaces .
15. The nurse would be correct in identifying the predominant extracellular cation as:
• A) Potassium
• B) Magnesium
• C) Sodium
• D) Calcium
Answer: C) Sodium
Rationale: Sodium (Na+) is the primary extracellular cation, while potassium (K+) is the predominant
intracellular cation .
