NR 507 Advanced Pathophysiology Midterm Exam | Latest
Update 2026/2027 | 200 Practice Questions with Verified
Answers & Explanations
SECTION 1: CELLULAR ADAPTATION, INJURY & NEOPLASIA (Questions 130)
1. A patient with chronic hypertension has an enlarged heart. This increase in muscle mass is primarily
due to which cellular adaptation?
A) Hyperplasia
B) Metaplasia
C) Hypertrophy
D) Dysplasia
Answer: C) Hypertrophy
Explanation: Hypertrophy is an increase in the size of cells, leading to an enlarged organ. Cardiac muscle
cells are terminally differentiated and cannot divide, so they adapt to increased workload through
hypertrophy, not hyperplasia (increase in cell number).
2. The irreversible point in cellular injury where cell death is inevitable, even if the stressor is removed, is
known as the:
A) Point of no return
B) Cellular apoptosis threshold
C) Necrotic point
D) Ischemic threshold
,Answer: A) Point of no return
Explanation: The "point of no return" is a key concept in cellular injury where mitochondrial damage
becomes so severe that ATP production ceases entirely, leading to irreversible membrane and DNA
damage.
3. Which of the following is a characteristic feature of apoptosis?
A) Elicits a significant inflammatory response
B) Results in cellular swelling and rupture
C) Involves organized cell shrinkage and fragmentation
D) Is always a pathological process
Answer: C) Involves organized cell shrinkage and fragmentation
Explanation: Apoptosis is programmed, controlled cell death that does not cause inflammation. Necrosis
is characterized by cell swelling, rupture, and inflammation.
4. Ischemiareperfusion injury causes additional cellular damage primarily due to:
A) Immediate restoration of ATP levels
B) Influx of calcium and generation of oxygenfree radicals
C) Rapid normalization of pH
D) Prevention of inflammatory cell infiltration
Answer: B) Influx of calcium and generation of oxygenfree radicals
,Explanation: When blood flow returns (reperfusion), it brings oxygen which leads to a burst of free
radical production and an influx of calcium, exacerbating the injury caused by the initial ischemia.
5. Coagulative necrosis is most commonly seen in which organ?
A) Brain
B) Heart (myocardial infarction)
C) Liver
D) Kidney
Answer: B) Heart (myocardial infarction)
Explanation: Coagulative necrosis is characteristic of ischemic injury in solid organs with good structural
support, most commonly seen in myocardial infarction.
6. Caseous necrosis is characteristic of which condition?
A) Tuberculosis
B) Myocardial infarction
C) Pancreatitis
D) Gangrene
Answer: A) Tuberculosis
, Explanation: Caseous necrosis (cheeselike appearance) is characteristic of tuberculosis, representing a
combination of coagulative and liquefactive necrosis with granulomatous inflammation.
7. Gangrenous necrosis is most commonly associated with:
A) Brain injury
B) Lower extremities (ischemia with bacterial infection)
C) Liver injury
D) Lung infection
Answer: B) Lower extremities (ischemia with bacterial infection)
Explanation: Gangrenous necrosis occurs in the lower extremities due to ischemia (dry gangrene) or with
superimposed bacterial infection (wet gangrene). It most commonly affects the toes, feet, and lower
legs in patients with peripheral vascular disease.
8. Apoptosis is best described as:
A) Uncontrolled cell death causing inflammation
B) Programmed cell death (physiologic)
C) Necrosis due to ischemia
D) Cell death due to bacterial toxins
Answer: B) Programmed cell death (physiologic)
Update 2026/2027 | 200 Practice Questions with Verified
Answers & Explanations
SECTION 1: CELLULAR ADAPTATION, INJURY & NEOPLASIA (Questions 130)
1. A patient with chronic hypertension has an enlarged heart. This increase in muscle mass is primarily
due to which cellular adaptation?
A) Hyperplasia
B) Metaplasia
C) Hypertrophy
D) Dysplasia
Answer: C) Hypertrophy
Explanation: Hypertrophy is an increase in the size of cells, leading to an enlarged organ. Cardiac muscle
cells are terminally differentiated and cannot divide, so they adapt to increased workload through
hypertrophy, not hyperplasia (increase in cell number).
2. The irreversible point in cellular injury where cell death is inevitable, even if the stressor is removed, is
known as the:
A) Point of no return
B) Cellular apoptosis threshold
C) Necrotic point
D) Ischemic threshold
,Answer: A) Point of no return
Explanation: The "point of no return" is a key concept in cellular injury where mitochondrial damage
becomes so severe that ATP production ceases entirely, leading to irreversible membrane and DNA
damage.
3. Which of the following is a characteristic feature of apoptosis?
A) Elicits a significant inflammatory response
B) Results in cellular swelling and rupture
C) Involves organized cell shrinkage and fragmentation
D) Is always a pathological process
Answer: C) Involves organized cell shrinkage and fragmentation
Explanation: Apoptosis is programmed, controlled cell death that does not cause inflammation. Necrosis
is characterized by cell swelling, rupture, and inflammation.
4. Ischemiareperfusion injury causes additional cellular damage primarily due to:
A) Immediate restoration of ATP levels
B) Influx of calcium and generation of oxygenfree radicals
C) Rapid normalization of pH
D) Prevention of inflammatory cell infiltration
Answer: B) Influx of calcium and generation of oxygenfree radicals
,Explanation: When blood flow returns (reperfusion), it brings oxygen which leads to a burst of free
radical production and an influx of calcium, exacerbating the injury caused by the initial ischemia.
5. Coagulative necrosis is most commonly seen in which organ?
A) Brain
B) Heart (myocardial infarction)
C) Liver
D) Kidney
Answer: B) Heart (myocardial infarction)
Explanation: Coagulative necrosis is characteristic of ischemic injury in solid organs with good structural
support, most commonly seen in myocardial infarction.
6. Caseous necrosis is characteristic of which condition?
A) Tuberculosis
B) Myocardial infarction
C) Pancreatitis
D) Gangrene
Answer: A) Tuberculosis
, Explanation: Caseous necrosis (cheeselike appearance) is characteristic of tuberculosis, representing a
combination of coagulative and liquefactive necrosis with granulomatous inflammation.
7. Gangrenous necrosis is most commonly associated with:
A) Brain injury
B) Lower extremities (ischemia with bacterial infection)
C) Liver injury
D) Lung infection
Answer: B) Lower extremities (ischemia with bacterial infection)
Explanation: Gangrenous necrosis occurs in the lower extremities due to ischemia (dry gangrene) or with
superimposed bacterial infection (wet gangrene). It most commonly affects the toes, feet, and lower
legs in patients with peripheral vascular disease.
8. Apoptosis is best described as:
A) Uncontrolled cell death causing inflammation
B) Programmed cell death (physiologic)
C) Necrosis due to ischemia
D) Cell death due to bacterial toxins
Answer: B) Programmed cell death (physiologic)
