NURS 6501 ADVANCED PATHOPHYSIOLOGY
Walden University Midterm Exam (2026/2027)
Actual Exam + Practice Test Bank | 120 Questions
Aligned with Walden University NURS 6501 Course Syllabus, AACN Essentials of Master's Education, and Advanced
Pathophysiology Curriculum Standards
Total Questions: 120 | Format: Multiple Choice (A-D) | Cognitive Levels: 20% Recall, 50% Application, 30% Analysis |
Question Style: 75% Scenario-Based, 25% Direct Knowledge
Sections: (1) Cellular & Molecular Pathophysiology - 15; (2) Genetics & Genetic Disorders - 10; (3) Inflammation, Immunity, &
Infection - 15; (4) Fluid, Electrolyte, & Acid-Base Disorders - 10; (5) Cardiovascular Pathophysiology - 15; (6) Pulmonary
Pathophysiology - 12; (7) Renal & Genitourinary Pathophysiology - 12; (8) Gastrointestinal & Hepatic Pathophysiology - 10; (9)
Endocrine & Metabolic Pathophysiology - 10; (10) Neurological & Neuromuscular Pathophysiology - 11.
Special Inclusions: 20 questions on disease mechanisms and pathophysiological processes; 15 questions on clinical
manifestations and their pathophysiological basis; 10 questions on genetic and molecular mechanisms of disease.
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 1
,Walden University NURS 6501 - Advanced Pathophysiology - Midterm Exam Preparation
Section 1: Cellular & Molecular Pathophysiology
This section examines cellular injury, adaptation, and death (atrophy, hypertrophy, hyperplasia, metaplasia, dysplasia, necrosis,
apoptosis) and cellular mechanisms including membrane transport, signal transduction, energy metabolism, and oxidative stress
- the foundational science underlying all pathophysiological processes.
Q1: A 68-year-old male with chronic heart failure presents with an enlarged heart on echocardiogram. The
cardiomyocytes have increased in size but not in number. Which cellular adaptation is this?
A. Atrophy
B. Hypertrophy *[CORRECT]*
C. Hyperplasia
D. Metaplasia
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size without an increase in cell number, commonly seen in cardiac and skeletal
muscle in response to increased workload. Atrophy is a decrease in cell size. Hyperplasia is an increase in cell number, which
cannot occur in terminally differentiated cardiac muscle. Metaplasia is the reversible replacement of one adult cell type with
another. The Walden NURS 6501 curriculum emphasizes that cardiac muscle adapts only through hypertrophy because
cardiomyocytes cannot undergo mitotic division.
Q2: A 45-year-old chronic smoker undergoes bronchoscopy. Biopsy of the bronchial epithelium reveals
replacement of normal ciliated columnar epithelium with stratified squamous epithelium. Which cellular
adaptation has occurred?
A. Dysplasia
B. Metaplasia *[CORRECT]*
C. Anaplasia
D. Hyperplasia
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated adult cell type with another, often an adaptive response
to chronic irritation (e.g., squamous metaplasia of bronchial epithelium in smokers). Dysplasia is disordered cellular growth
with atypical features. Anaplasia is lack of differentiation characteristic of malignant cells. Hyperplasia is increased cell number
of the same type. The Walden curriculum emphasizes that metaplasia is reversible upon removal of the irritant but is a precursor
to dysplasia and possible malignancy.
Q3: A 55-year-old male sustains an acute myocardial infarction. Six hours after the infarction, histologic
examination of the necrotic myocardium would most likely reveal:
A. Apoptosis with chromatin condensation and apoptotic bodies
B. Coagulative necrosis with preserved tissue architecture *[CORRECT]*
C. Liquefactive necrosis with cyst formation
D. Caseous necrosis with cheese-like appearance
Correct Answer: B
Rationale: Coagulative necrosis, characterized by protein denaturation and preserved tissue architecture, is the hallmark of
ischemic injury in most solid organs, especially the heart and kidney. Apoptosis is programmed cell death with chromatin
condensation and apoptotic bodies - a controlled process that does not typically dominate acute MI necrosis. Liquefactive
necrosis occurs in the brain (ischemic stroke) and in bacterial abscesses. Caseous necrosis is associated with tuberculosis. The
Walden curriculum emphasizes that the type of necrosis is determined by the underlying injury and tissue type.
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 2
,Walden University NURS 6501 - Advanced Pathophysiology - Midterm Exam Preparation
Q4: A 32-year-old female presents with progressive muscle weakness. Genetic testing reveals a mutation
causing dysfunctional mitochondria. Which cellular process is most directly impaired?
A. Anaerobic glycolysis
B. Oxidative phosphorylation (aerobic ATP production) *[CORRECT]*
C. Glycogen synthesis
D. Protein synthesis at the rough ER
Correct Answer: B
Rationale: Mitochondria are the primary site of oxidative phosphorylation, the aerobic pathway generating ~36 ATP per glucose
molecule via the electron transport chain. Mitochondrial dysfunction impairs aerobic ATP production, forcing cells to rely on
anaerobic glycolysis (only 2 ATP per glucose). Anaerobic glycolysis occurs in the cytoplasm. Glycogen synthesis occurs in the
cytoplasm and liver. Protein synthesis occurs at the rough endoplasmic reticulum. The Walden NURS 6501 curriculum
emphasizes cellular energy metabolism as foundational to understanding cellular injury.
Q5: A 60-year-old male with diabetes presents with chronic hyperglycemia. His tissues show accumulation of
advanced glycation end-products (AGEs) and increased oxidative stress. The damage is primarily mediated
by:
A. Increased ATP production
B. Accumulation of reactive oxygen species (ROS) causing lipid, protein, and DNA damage *[CORRECT]*
C. Decreased intracellular calcium
D. Enhanced membrane transport
Correct Answer: B
Rationale: Oxidative stress results from an imbalance between reactive oxygen species (ROS) production and antioxidant
defenses. ROS (superoxide, hydrogen peroxide, hydroxyl radical) damage lipids (lipid peroxidation), proteins (oxidation), and
DNA (strand breaks), leading to cellular injury and contributing to diabetes complications. AGEs form from non-enzymatic
glycation of proteins. Increased ATP does not cause damage. Decreased calcium is not the primary mediator. The Walden
curriculum emphasizes oxidative stress as a unifying mechanism of cellular injury in chronic disease.
Q6: A 50-year-old male with severe crush injury develops markedly elevated serum potassium. The cell
membrane potential is altered. The most likely cellular mechanism is impaired function of the:
A. Sodium-potassium ATPase pump *[CORRECT]*
B. Golgi apparatus
C. Lysosomal enzymes
D. Mitochondrial cristae
Correct Answer: A
Rationale: The sodium-potassium ATPase pump maintains the electrochemical gradient by transporting 3 Na+ out of the cell for
every 2 K+ transported into the cell, using ATP. Elevated extracellular potassium alters the resting membrane potential, leading
to cellular dysfunction (especially in cardiac muscle). The Golgi processes and packages proteins. Lysosomes digest cellular
debris. Mitochondrial cristae house the electron transport chain. The Walden NURS 6501 curriculum emphasizes that membrane
transport mechanisms are critical for cellular homeostasis and excitability.
Q7: A 70-year-old female with prolonged immobility develops muscle wasting. The affected muscle cells have
decreased in size. Which cellular adaptation is this?
A. Hypertrophy
B. Atrophy *[CORRECT]*
C. Metaplasia
D. Dysplasia
Correct Answer: B
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 3
, Walden University NURS 6501 - Advanced Pathophysiology - Midterm Exam Preparation
Rationale: Atrophy is the decrease in cell size due to decreased use, denervation, ischemia, or inadequate nutrition. In disuse
atrophy from immobility, muscle cells shrink due to decreased protein synthesis and increased protein degradation. Hypertrophy
is increased cell size. Metaplasia and dysplasia are altered cell differentiation, not size changes. The Walden NURS 6501
curriculum distinguishes atrophy (decreased size) from apoptosis (cell death).
Q8: A 25-year-old female presents with cervical dysplasia on Pap smear. The pathologist describes disordered
cellular growth with atypical nuclei but no invasion through the basement membrane. Which cellular change
is this?
A. Metaplasia
B. Dysplasia *[CORRECT]*
C. Anaplasia
D. Hyperplasia
Correct Answer: B
Rationale: Dysplasia is disordered cellular growth characterized by pleomorphism, hyperchromatic nuclei, and abnormal
nuclear-to-cytoplasmic ratio, but the cells remain within the basement membrane (pre-malignant). Metaplasia is replacement of
one cell type with another. Anaplasia is lack of differentiation characteristic of invasive cancer. Hyperplasia is increased cell
number without atypia. The Walden NURS 6501 curriculum emphasizes that dysplasia is reversible but a precursor to carcinoma
in situ and invasive carcinoma.
Q9: A 65-year-old male suffers a stroke. Five days later, a CT scan reveals a cystic area in the brain at the site
of infarction. Which type of necrosis has occurred?
A. Coagulative necrosis
B. Liquefactive necrosis *[CORRECT]*
C. Caseous necrosis
D. Fibrinoid necrosis
Correct Answer: B
Rationale: Liquefactive necrosis occurs in the brain after ischemic injury because brain tissue lacks substantial connective tissue
and is rich in lipids and enzymes. Neutrophils infiltrate and release hydrolytic enzymes, digesting the tissue into a liquid cyst.
Coagulative necrosis is typical in most solid organs (heart, kidney). Caseous necrosis is associated with tuberculosis. Fibrinoid
necrosis occurs in blood vessel walls in malignant hypertension. The Walden curriculum emphasizes the unique pattern of brain
necrosis.
Q10: A 40-year-old female with chronic GERD undergoes endoscopy. Biopsy reveals intestinal metaplasia of
the distal esophagus (Barrett esophagus). The underlying mechanism of this metaplasia is:
A. Genetic mutation causing neoplastic transformation
B. Reversible adaptive substitution of squamous epithelium by intestinal-type columnar epithelium in response
to chronic acid exposure *[CORRECT]*
C. Autoimmune destruction of squamous cells
D. Viral infection causing cell death
Correct Answer: B
Rationale: Barrett esophagus is metaplasia in which chronic acid exposure causes the normal stratified squamous epithelium to
be replaced by intestinal-type columnar epithelium, which is more resistant to acid. This is a reversible adaptive response, not a
neoplastic transformation. It is not autoimmune or viral. The Walden curriculum emphasizes that metaplasia is adaptive but
increases the risk of progression to dysplasia and adenocarcinoma.
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 4
Walden University Midterm Exam (2026/2027)
Actual Exam + Practice Test Bank | 120 Questions
Aligned with Walden University NURS 6501 Course Syllabus, AACN Essentials of Master's Education, and Advanced
Pathophysiology Curriculum Standards
Total Questions: 120 | Format: Multiple Choice (A-D) | Cognitive Levels: 20% Recall, 50% Application, 30% Analysis |
Question Style: 75% Scenario-Based, 25% Direct Knowledge
Sections: (1) Cellular & Molecular Pathophysiology - 15; (2) Genetics & Genetic Disorders - 10; (3) Inflammation, Immunity, &
Infection - 15; (4) Fluid, Electrolyte, & Acid-Base Disorders - 10; (5) Cardiovascular Pathophysiology - 15; (6) Pulmonary
Pathophysiology - 12; (7) Renal & Genitourinary Pathophysiology - 12; (8) Gastrointestinal & Hepatic Pathophysiology - 10; (9)
Endocrine & Metabolic Pathophysiology - 10; (10) Neurological & Neuromuscular Pathophysiology - 11.
Special Inclusions: 20 questions on disease mechanisms and pathophysiological processes; 15 questions on clinical
manifestations and their pathophysiological basis; 10 questions on genetic and molecular mechanisms of disease.
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 1
,Walden University NURS 6501 - Advanced Pathophysiology - Midterm Exam Preparation
Section 1: Cellular & Molecular Pathophysiology
This section examines cellular injury, adaptation, and death (atrophy, hypertrophy, hyperplasia, metaplasia, dysplasia, necrosis,
apoptosis) and cellular mechanisms including membrane transport, signal transduction, energy metabolism, and oxidative stress
- the foundational science underlying all pathophysiological processes.
Q1: A 68-year-old male with chronic heart failure presents with an enlarged heart on echocardiogram. The
cardiomyocytes have increased in size but not in number. Which cellular adaptation is this?
A. Atrophy
B. Hypertrophy *[CORRECT]*
C. Hyperplasia
D. Metaplasia
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size without an increase in cell number, commonly seen in cardiac and skeletal
muscle in response to increased workload. Atrophy is a decrease in cell size. Hyperplasia is an increase in cell number, which
cannot occur in terminally differentiated cardiac muscle. Metaplasia is the reversible replacement of one adult cell type with
another. The Walden NURS 6501 curriculum emphasizes that cardiac muscle adapts only through hypertrophy because
cardiomyocytes cannot undergo mitotic division.
Q2: A 45-year-old chronic smoker undergoes bronchoscopy. Biopsy of the bronchial epithelium reveals
replacement of normal ciliated columnar epithelium with stratified squamous epithelium. Which cellular
adaptation has occurred?
A. Dysplasia
B. Metaplasia *[CORRECT]*
C. Anaplasia
D. Hyperplasia
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated adult cell type with another, often an adaptive response
to chronic irritation (e.g., squamous metaplasia of bronchial epithelium in smokers). Dysplasia is disordered cellular growth
with atypical features. Anaplasia is lack of differentiation characteristic of malignant cells. Hyperplasia is increased cell number
of the same type. The Walden curriculum emphasizes that metaplasia is reversible upon removal of the irritant but is a precursor
to dysplasia and possible malignancy.
Q3: A 55-year-old male sustains an acute myocardial infarction. Six hours after the infarction, histologic
examination of the necrotic myocardium would most likely reveal:
A. Apoptosis with chromatin condensation and apoptotic bodies
B. Coagulative necrosis with preserved tissue architecture *[CORRECT]*
C. Liquefactive necrosis with cyst formation
D. Caseous necrosis with cheese-like appearance
Correct Answer: B
Rationale: Coagulative necrosis, characterized by protein denaturation and preserved tissue architecture, is the hallmark of
ischemic injury in most solid organs, especially the heart and kidney. Apoptosis is programmed cell death with chromatin
condensation and apoptotic bodies - a controlled process that does not typically dominate acute MI necrosis. Liquefactive
necrosis occurs in the brain (ischemic stroke) and in bacterial abscesses. Caseous necrosis is associated with tuberculosis. The
Walden curriculum emphasizes that the type of necrosis is determined by the underlying injury and tissue type.
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 2
,Walden University NURS 6501 - Advanced Pathophysiology - Midterm Exam Preparation
Q4: A 32-year-old female presents with progressive muscle weakness. Genetic testing reveals a mutation
causing dysfunctional mitochondria. Which cellular process is most directly impaired?
A. Anaerobic glycolysis
B. Oxidative phosphorylation (aerobic ATP production) *[CORRECT]*
C. Glycogen synthesis
D. Protein synthesis at the rough ER
Correct Answer: B
Rationale: Mitochondria are the primary site of oxidative phosphorylation, the aerobic pathway generating ~36 ATP per glucose
molecule via the electron transport chain. Mitochondrial dysfunction impairs aerobic ATP production, forcing cells to rely on
anaerobic glycolysis (only 2 ATP per glucose). Anaerobic glycolysis occurs in the cytoplasm. Glycogen synthesis occurs in the
cytoplasm and liver. Protein synthesis occurs at the rough endoplasmic reticulum. The Walden NURS 6501 curriculum
emphasizes cellular energy metabolism as foundational to understanding cellular injury.
Q5: A 60-year-old male with diabetes presents with chronic hyperglycemia. His tissues show accumulation of
advanced glycation end-products (AGEs) and increased oxidative stress. The damage is primarily mediated
by:
A. Increased ATP production
B. Accumulation of reactive oxygen species (ROS) causing lipid, protein, and DNA damage *[CORRECT]*
C. Decreased intracellular calcium
D. Enhanced membrane transport
Correct Answer: B
Rationale: Oxidative stress results from an imbalance between reactive oxygen species (ROS) production and antioxidant
defenses. ROS (superoxide, hydrogen peroxide, hydroxyl radical) damage lipids (lipid peroxidation), proteins (oxidation), and
DNA (strand breaks), leading to cellular injury and contributing to diabetes complications. AGEs form from non-enzymatic
glycation of proteins. Increased ATP does not cause damage. Decreased calcium is not the primary mediator. The Walden
curriculum emphasizes oxidative stress as a unifying mechanism of cellular injury in chronic disease.
Q6: A 50-year-old male with severe crush injury develops markedly elevated serum potassium. The cell
membrane potential is altered. The most likely cellular mechanism is impaired function of the:
A. Sodium-potassium ATPase pump *[CORRECT]*
B. Golgi apparatus
C. Lysosomal enzymes
D. Mitochondrial cristae
Correct Answer: A
Rationale: The sodium-potassium ATPase pump maintains the electrochemical gradient by transporting 3 Na+ out of the cell for
every 2 K+ transported into the cell, using ATP. Elevated extracellular potassium alters the resting membrane potential, leading
to cellular dysfunction (especially in cardiac muscle). The Golgi processes and packages proteins. Lysosomes digest cellular
debris. Mitochondrial cristae house the electron transport chain. The Walden NURS 6501 curriculum emphasizes that membrane
transport mechanisms are critical for cellular homeostasis and excitability.
Q7: A 70-year-old female with prolonged immobility develops muscle wasting. The affected muscle cells have
decreased in size. Which cellular adaptation is this?
A. Hypertrophy
B. Atrophy *[CORRECT]*
C. Metaplasia
D. Dysplasia
Correct Answer: B
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 3
, Walden University NURS 6501 - Advanced Pathophysiology - Midterm Exam Preparation
Rationale: Atrophy is the decrease in cell size due to decreased use, denervation, ischemia, or inadequate nutrition. In disuse
atrophy from immobility, muscle cells shrink due to decreased protein synthesis and increased protein degradation. Hypertrophy
is increased cell size. Metaplasia and dysplasia are altered cell differentiation, not size changes. The Walden NURS 6501
curriculum distinguishes atrophy (decreased size) from apoptosis (cell death).
Q8: A 25-year-old female presents with cervical dysplasia on Pap smear. The pathologist describes disordered
cellular growth with atypical nuclei but no invasion through the basement membrane. Which cellular change
is this?
A. Metaplasia
B. Dysplasia *[CORRECT]*
C. Anaplasia
D. Hyperplasia
Correct Answer: B
Rationale: Dysplasia is disordered cellular growth characterized by pleomorphism, hyperchromatic nuclei, and abnormal
nuclear-to-cytoplasmic ratio, but the cells remain within the basement membrane (pre-malignant). Metaplasia is replacement of
one cell type with another. Anaplasia is lack of differentiation characteristic of invasive cancer. Hyperplasia is increased cell
number without atypia. The Walden NURS 6501 curriculum emphasizes that dysplasia is reversible but a precursor to carcinoma
in situ and invasive carcinoma.
Q9: A 65-year-old male suffers a stroke. Five days later, a CT scan reveals a cystic area in the brain at the site
of infarction. Which type of necrosis has occurred?
A. Coagulative necrosis
B. Liquefactive necrosis *[CORRECT]*
C. Caseous necrosis
D. Fibrinoid necrosis
Correct Answer: B
Rationale: Liquefactive necrosis occurs in the brain after ischemic injury because brain tissue lacks substantial connective tissue
and is rich in lipids and enzymes. Neutrophils infiltrate and release hydrolytic enzymes, digesting the tissue into a liquid cyst.
Coagulative necrosis is typical in most solid organs (heart, kidney). Caseous necrosis is associated with tuberculosis. Fibrinoid
necrosis occurs in blood vessel walls in malignant hypertension. The Walden curriculum emphasizes the unique pattern of brain
necrosis.
Q10: A 40-year-old female with chronic GERD undergoes endoscopy. Biopsy reveals intestinal metaplasia of
the distal esophagus (Barrett esophagus). The underlying mechanism of this metaplasia is:
A. Genetic mutation causing neoplastic transformation
B. Reversible adaptive substitution of squamous epithelium by intestinal-type columnar epithelium in response
to chronic acid exposure *[CORRECT]*
C. Autoimmune destruction of squamous cells
D. Viral infection causing cell death
Correct Answer: B
Rationale: Barrett esophagus is metaplasia in which chronic acid exposure causes the normal stratified squamous epithelium to
be replaced by intestinal-type columnar epithelium, which is more resistant to acid. This is a reversible adaptive response, not a
neoplastic transformation. It is not autoimmune or viral. The Walden curriculum emphasizes that metaplasia is adaptive but
increases the risk of progression to dysplasia and adenocarcinoma.
NURS 6501 Advanced Pathophysiology - Walden University Midterm Exam (2026/2027) Page 4
