NUR 376 Pathophysiology Exam 1 Actual Exam
2026/2027 – Questions with Complete
Solutions – Detailed Rationales – Pass
Guaranteed – A+ Graded
Cellular Adaptation, Injury & Neoplasia
Q1: Let's start with some basics. When a cell shrinks in size and reduces its functional
capacity due to decreased workload, poor blood supply, or inadequate nutrition, what is
this cellular adaptation called?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C
Rationale: Atrophy is the decrease in cell size, which leads to a reduction in tissue
mass. Hypertrophy is an increase in cell size, hyperplasia is an increase in cell number,
and metaplasia is a change in cell type.
Q2: A patient with a long history of chronic gastroesophageal reflux disease (GERD)
has esophageal tissue changes where the normal stratified squamous epithelium is
replaced by columnar epithelium (Barrett's esophagus). This is an example of which
cellular adaptation?
A. Dysplasia
B. Metaplasia
C. Hyperplasia
D. Anaplasia
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one mature cell type by another,
often as an adaptive response to chronic irritation or stress. In this case, acid reflux
causes the squamous cells to change to a more resistant columnar type. Dysplasia is
abnormal, pre-cancerous changes, and anaplasia refers to undifferentiated tumor cells.
Q3: A 25-year-old male begins an intense weightlifting program. Over several months,
his bicep muscles significantly increase in mass. This is an example of:
A. Physiologic hypertrophy
,B. Pathologic hypertrophy
C. Physiologic hyperplasia
D. Compensatory hyperplasia
Correct Answer: A
Rationale: Hypertrophy is an increase in the size of individual cells. When it occurs in
response to increased demand like exercise, it's physiologic (normal). Pathologic
hypertrophy occurs due to disease, like a heart enlarging from hypertension.
Hyperplasia involves an increase in the number of cells, not just their size.
Q4: A biopsy of a patient's cervix shows cells that have abnormal variations in size and
shape, with disorganized nuclei, but the changes have not broken through the
basement membrane. How do you differentiate this from metaplasia?
A. Metaplasia involves malignant transformation, while this does not.
B. Metaplasia is a change to a different mature cell type, while this describes dysplasia,
which is abnormal, pre-malignant cell growth.
C. Metaplasia only occurs in the liver, while dysplasia occurs in the cervix.
D. There is no difference; they are interchangeable terms.
Correct Answer: B
Rationale: This is a crucial distinction. Metaplasia is a reversible change from one adult
cell type to another (like squamous to columnar) in response to stress. Dysplasia is the
derangement of cell growth, leading to abnormal size, shape, and organization.
Dysplasia is considered a pre-cancerous state, whereas metaplasia is generally an
adaptive, though potentially risky, change.
Q5: What is the primary pathophysiologic difference between apoptosis and necrosis?
A. Apoptosis is a programmed, energy-dependent cell death that doesn't cause
inflammation, whereas necrosis is accidental, uncontrolled cell death that triggers
inflammation.
B. Necrosis is programmed cell death, while apoptosis causes severe systemic
inflammation.
C. Apoptosis only occurs in cancer cells, while necrosis only occurs in healthy cells.
D. There is no difference; they are two words for the exact same process.
Correct Answer: A
Rationale: Apoptosis is often described as "cell suicide"—it's neat, requires ATP,
involves cell shrinking, and fragments the DNA without leaking cellular contents, so it
doesn't cause inflammation. Necrosis is caused by severe injury (like hypoxia or toxins),
causing the cell to swell, burst, and spill its contents, which triggers a robust
inflammatory response.
, Q6: A patient suffers a myocardial infarction. When examining the dead heart tissue
under a microscope, the pathologist notes that the basic structural outline of the cells is
still preserved, but the nuclei have disappeared. Which specific type of necrosis is this?
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B
Rationale: Coagulative necrosis is the most common type and is typically seen in
ischemic injury to all organs except the brain. The key hallmark is that the tissue
becomes firm and the basic cellular architecture (the "ghost" outline) is maintained for a
time, though the nuclei are dead.
Q7: Why does a stroke (cerebral infarction) look different under a microscope compared
to a heart attack?
A. The brain undergoes liquefactive necrosis because brain tissue is rich in lipids and
lacks a firm stroma, turning into a liquid, pus-like substance.
B. The brain undergoes caseous necrosis due to a higher risk of tuberculosis.
C. The heart undergoes liquefactive necrosis, while the brain undergoes coagulative.
D. The brain does not undergo necrosis; it only undergoes apoptosis.
Correct Answer: A
Rationale: This is a classic board question. Brain tissue is very lipid-rich and lacks the
structural support (collagen) found in the heart. Therefore, when brain cells die from
ischemia, they undergo liquefactive necrosis, where the tissue softens and liquefies into
a cystic space, rather than maintaining its shape.
Q8: A patient with acute pancreatitis develops severe abdominal pain. The provider
explains that pancreatic enzymes are leaking into the peritoneal cavity and digesting fat
cells. What type of tissue necrosis is occurring?
A. Coagulative
B. Caseous
C. Fat necrosis
D. Gangrenous
Correct Answer: C
Rationale: Fat necrosis occurs when lipases (like those released in acute pancreatitis)
break down triglycerides into free fatty acids. These fatty acids combine with calcium to
form chalky, white deposits (saponification) in the damaged fat tissue.
Q9: A patient with severe peripheral vascular disease develops a dry, black, mummified
toe. There is no pus or wetness. What type of necrosis is this, and what is the
underlying mechanism?
2026/2027 – Questions with Complete
Solutions – Detailed Rationales – Pass
Guaranteed – A+ Graded
Cellular Adaptation, Injury & Neoplasia
Q1: Let's start with some basics. When a cell shrinks in size and reduces its functional
capacity due to decreased workload, poor blood supply, or inadequate nutrition, what is
this cellular adaptation called?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C
Rationale: Atrophy is the decrease in cell size, which leads to a reduction in tissue
mass. Hypertrophy is an increase in cell size, hyperplasia is an increase in cell number,
and metaplasia is a change in cell type.
Q2: A patient with a long history of chronic gastroesophageal reflux disease (GERD)
has esophageal tissue changes where the normal stratified squamous epithelium is
replaced by columnar epithelium (Barrett's esophagus). This is an example of which
cellular adaptation?
A. Dysplasia
B. Metaplasia
C. Hyperplasia
D. Anaplasia
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one mature cell type by another,
often as an adaptive response to chronic irritation or stress. In this case, acid reflux
causes the squamous cells to change to a more resistant columnar type. Dysplasia is
abnormal, pre-cancerous changes, and anaplasia refers to undifferentiated tumor cells.
Q3: A 25-year-old male begins an intense weightlifting program. Over several months,
his bicep muscles significantly increase in mass. This is an example of:
A. Physiologic hypertrophy
,B. Pathologic hypertrophy
C. Physiologic hyperplasia
D. Compensatory hyperplasia
Correct Answer: A
Rationale: Hypertrophy is an increase in the size of individual cells. When it occurs in
response to increased demand like exercise, it's physiologic (normal). Pathologic
hypertrophy occurs due to disease, like a heart enlarging from hypertension.
Hyperplasia involves an increase in the number of cells, not just their size.
Q4: A biopsy of a patient's cervix shows cells that have abnormal variations in size and
shape, with disorganized nuclei, but the changes have not broken through the
basement membrane. How do you differentiate this from metaplasia?
A. Metaplasia involves malignant transformation, while this does not.
B. Metaplasia is a change to a different mature cell type, while this describes dysplasia,
which is abnormal, pre-malignant cell growth.
C. Metaplasia only occurs in the liver, while dysplasia occurs in the cervix.
D. There is no difference; they are interchangeable terms.
Correct Answer: B
Rationale: This is a crucial distinction. Metaplasia is a reversible change from one adult
cell type to another (like squamous to columnar) in response to stress. Dysplasia is the
derangement of cell growth, leading to abnormal size, shape, and organization.
Dysplasia is considered a pre-cancerous state, whereas metaplasia is generally an
adaptive, though potentially risky, change.
Q5: What is the primary pathophysiologic difference between apoptosis and necrosis?
A. Apoptosis is a programmed, energy-dependent cell death that doesn't cause
inflammation, whereas necrosis is accidental, uncontrolled cell death that triggers
inflammation.
B. Necrosis is programmed cell death, while apoptosis causes severe systemic
inflammation.
C. Apoptosis only occurs in cancer cells, while necrosis only occurs in healthy cells.
D. There is no difference; they are two words for the exact same process.
Correct Answer: A
Rationale: Apoptosis is often described as "cell suicide"—it's neat, requires ATP,
involves cell shrinking, and fragments the DNA without leaking cellular contents, so it
doesn't cause inflammation. Necrosis is caused by severe injury (like hypoxia or toxins),
causing the cell to swell, burst, and spill its contents, which triggers a robust
inflammatory response.
, Q6: A patient suffers a myocardial infarction. When examining the dead heart tissue
under a microscope, the pathologist notes that the basic structural outline of the cells is
still preserved, but the nuclei have disappeared. Which specific type of necrosis is this?
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B
Rationale: Coagulative necrosis is the most common type and is typically seen in
ischemic injury to all organs except the brain. The key hallmark is that the tissue
becomes firm and the basic cellular architecture (the "ghost" outline) is maintained for a
time, though the nuclei are dead.
Q7: Why does a stroke (cerebral infarction) look different under a microscope compared
to a heart attack?
A. The brain undergoes liquefactive necrosis because brain tissue is rich in lipids and
lacks a firm stroma, turning into a liquid, pus-like substance.
B. The brain undergoes caseous necrosis due to a higher risk of tuberculosis.
C. The heart undergoes liquefactive necrosis, while the brain undergoes coagulative.
D. The brain does not undergo necrosis; it only undergoes apoptosis.
Correct Answer: A
Rationale: This is a classic board question. Brain tissue is very lipid-rich and lacks the
structural support (collagen) found in the heart. Therefore, when brain cells die from
ischemia, they undergo liquefactive necrosis, where the tissue softens and liquefies into
a cystic space, rather than maintaining its shape.
Q8: A patient with acute pancreatitis develops severe abdominal pain. The provider
explains that pancreatic enzymes are leaking into the peritoneal cavity and digesting fat
cells. What type of tissue necrosis is occurring?
A. Coagulative
B. Caseous
C. Fat necrosis
D. Gangrenous
Correct Answer: C
Rationale: Fat necrosis occurs when lipases (like those released in acute pancreatitis)
break down triglycerides into free fatty acids. These fatty acids combine with calcium to
form chalky, white deposits (saponification) in the damaged fat tissue.
Q9: A patient with severe peripheral vascular disease develops a dry, black, mummified
toe. There is no pus or wetness. What type of necrosis is this, and what is the
underlying mechanism?
