NR 507 Week 4 Midterm Question Bank |
Advanced Pathophysiology Exam Prep with High-
Yield Questions & Expert Rationales
SECTION I: CELLULAR ADAPTATION, INJURY & DEATH
1. A 68-year-old male with a 40-year history of smoking presents with chronic
cough and dyspnea. Lung biopsy reveals permanent enlargement of airspaces
distal to the terminal bronchioles with destruction of alveolar walls but no
fibrosis. Which pathophysiologic process best describes this finding?
A. Hyperplasia of alveolar cells
B. Hypertrophy of remaining alveolar structures
C. Metaplastic transformation of bronchial epithelium
D. Emphysematous destruction with compensatory hypertrophy of remaining
alveoli
D. Emphysematous destruction with compensatory hypertrophy of
remaining alveoli
Rationale: Emphysema is characterized by permanent enlargement of
airspaces distal to the terminal bronchioles with destruction of alveolar walls
without obvious fibrosis. While emphysema itself represents tissue destruction,
the remaining viable lung tissue undergoes compensatory hypertrophy to attempt
maintaining gas exchange function. This pathological process results from chronic
inflammation and protease-antiprotease imbalance, typically related to smoking
exposure.
2. A patient presents with jaundice, dark urine, and elevated direct bilirubin. Liver
biopsy shows intracellular accumulation of brownish-yellow pigment within
hepatocytes. Which cellular accumulation process is occurring?
A. Lipofuscin accumulation
B. Melanin deposition
,C. Bilirubin accumulation (cholestasis)
D. Hemosiderin deposition
C. Bilirubin accumulation (cholestasis)
Rationale: The clinical presentation of jaundice with elevated direct
(conjugated) bilirubin indicates cholestasis, where bilirubin accumulates within
hepatocytes and bile canaliculi due to impaired bile flow. The brownish-yellow
pigment represents retained bilirubin. This accumulation causes cellular
dysfunction and can lead to hepatocellular injury if prolonged.
3. Cell swelling is primarily caused by which mechanism?
A. ATP depletion
B. Hyperplasia
C. Atrophy
D. Fibrosis
A. ATP depletion
Rationale: ATP depletion leads to failure of the sodium-potassium (Na⁺/K⁺)
ATPase pump, causing intracellular sodium and water accumulation, resulting in
cellular swelling (hydropic degeneration). This is a reversible form of cell injury if
the energy supply is restored.
4. Apoptosis is best defined as:
A. Programmed cell death
B. Cell swelling and lysis
C. Infection-induced necrosis
D. Hyperplastic growth
A. Programmed cell death
Rationale: Apoptosis is a genetically programmed, energy-dependent
process of cellular self-destruction that eliminates unwanted or damaged cells
,without triggering inflammation. It is distinct from necrosis, which is a
pathological form of cell death associated with inflammation.
5. Necrosis typically causes which of the following?
A. Inflammation
B. Cellular adaptation
C. Repair only
D. Hyperplasia
A. Inflammation
Rationale: Necrosis is uncontrolled cell death that results in the release of
cellular contents into the extracellular space, triggering an inflammatory
response. This contrasts with apoptosis, which is a clean, non-inflammatory
process.
6. Which type of cellular adaptation is characterized by an increase in cell size
without an increase in cell number?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Atrophy
B. Hypertrophy
Rationale: Hypertrophy refers to an increase in the size of individual cells,
leading to an increase in organ size. It occurs in tissues incapable of cell division
(e.g., cardiac muscle, skeletal muscle) in response to increased workload or
hormonal stimulation. Hyperplasia involves an increase in cell number.
7. A patient with long-standing hypertension develops enlargement of the left
ventricle. This is an example of:
, A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
B. Hypertrophy
Rationale: Left ventricular hypertrophy in response to chronic
hypertension is a classic example of hypertrophy. The cardiac myocytes enlarge to
compensate for increased workload, but they cannot divide. This is an adaptive
response that can eventually become maladaptive, leading to heart failure.
8. A 45-year-old woman develops numbness and tingling in her fingers during a
viral illness. Laboratory studies reveal anti-ganglioside antibodies. Three weeks
prior, she experienced diarrhea. Which pathophysiologic mechanism explains her
condition?
A. Direct viral invasion of peripheral nerves
B. Molecular mimicry triggering autoimmune neuropathy
C. Toxin-mediated demyelination
D. Genetic predisposition without environmental trigger
B. Molecular mimicry triggering autoimmune neuropathy
Rationale: This presentation is consistent with Guillain-Barré syndrome,
specifically the acute motor axonal neuropathy (AMAN) variant associated with
Campylobacter jejuni infection. Molecular mimicry occurs when bacterial
ganglioside-like antigens induce antibodies that cross-react with host peripheral
nerve gangliosides, causing autoimmune-mediated nerve injury.
9. A patient with chronic renal failure develops metastatic calcification in soft
tissues. Which laboratory finding is most likely responsible?
A. Hypocalcemia with hyperphosphatemia
B. Hypercalcemia with normal phosphate
Advanced Pathophysiology Exam Prep with High-
Yield Questions & Expert Rationales
SECTION I: CELLULAR ADAPTATION, INJURY & DEATH
1. A 68-year-old male with a 40-year history of smoking presents with chronic
cough and dyspnea. Lung biopsy reveals permanent enlargement of airspaces
distal to the terminal bronchioles with destruction of alveolar walls but no
fibrosis. Which pathophysiologic process best describes this finding?
A. Hyperplasia of alveolar cells
B. Hypertrophy of remaining alveolar structures
C. Metaplastic transformation of bronchial epithelium
D. Emphysematous destruction with compensatory hypertrophy of remaining
alveoli
D. Emphysematous destruction with compensatory hypertrophy of
remaining alveoli
Rationale: Emphysema is characterized by permanent enlargement of
airspaces distal to the terminal bronchioles with destruction of alveolar walls
without obvious fibrosis. While emphysema itself represents tissue destruction,
the remaining viable lung tissue undergoes compensatory hypertrophy to attempt
maintaining gas exchange function. This pathological process results from chronic
inflammation and protease-antiprotease imbalance, typically related to smoking
exposure.
2. A patient presents with jaundice, dark urine, and elevated direct bilirubin. Liver
biopsy shows intracellular accumulation of brownish-yellow pigment within
hepatocytes. Which cellular accumulation process is occurring?
A. Lipofuscin accumulation
B. Melanin deposition
,C. Bilirubin accumulation (cholestasis)
D. Hemosiderin deposition
C. Bilirubin accumulation (cholestasis)
Rationale: The clinical presentation of jaundice with elevated direct
(conjugated) bilirubin indicates cholestasis, where bilirubin accumulates within
hepatocytes and bile canaliculi due to impaired bile flow. The brownish-yellow
pigment represents retained bilirubin. This accumulation causes cellular
dysfunction and can lead to hepatocellular injury if prolonged.
3. Cell swelling is primarily caused by which mechanism?
A. ATP depletion
B. Hyperplasia
C. Atrophy
D. Fibrosis
A. ATP depletion
Rationale: ATP depletion leads to failure of the sodium-potassium (Na⁺/K⁺)
ATPase pump, causing intracellular sodium and water accumulation, resulting in
cellular swelling (hydropic degeneration). This is a reversible form of cell injury if
the energy supply is restored.
4. Apoptosis is best defined as:
A. Programmed cell death
B. Cell swelling and lysis
C. Infection-induced necrosis
D. Hyperplastic growth
A. Programmed cell death
Rationale: Apoptosis is a genetically programmed, energy-dependent
process of cellular self-destruction that eliminates unwanted or damaged cells
,without triggering inflammation. It is distinct from necrosis, which is a
pathological form of cell death associated with inflammation.
5. Necrosis typically causes which of the following?
A. Inflammation
B. Cellular adaptation
C. Repair only
D. Hyperplasia
A. Inflammation
Rationale: Necrosis is uncontrolled cell death that results in the release of
cellular contents into the extracellular space, triggering an inflammatory
response. This contrasts with apoptosis, which is a clean, non-inflammatory
process.
6. Which type of cellular adaptation is characterized by an increase in cell size
without an increase in cell number?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Atrophy
B. Hypertrophy
Rationale: Hypertrophy refers to an increase in the size of individual cells,
leading to an increase in organ size. It occurs in tissues incapable of cell division
(e.g., cardiac muscle, skeletal muscle) in response to increased workload or
hormonal stimulation. Hyperplasia involves an increase in cell number.
7. A patient with long-standing hypertension develops enlargement of the left
ventricle. This is an example of:
, A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
B. Hypertrophy
Rationale: Left ventricular hypertrophy in response to chronic
hypertension is a classic example of hypertrophy. The cardiac myocytes enlarge to
compensate for increased workload, but they cannot divide. This is an adaptive
response that can eventually become maladaptive, leading to heart failure.
8. A 45-year-old woman develops numbness and tingling in her fingers during a
viral illness. Laboratory studies reveal anti-ganglioside antibodies. Three weeks
prior, she experienced diarrhea. Which pathophysiologic mechanism explains her
condition?
A. Direct viral invasion of peripheral nerves
B. Molecular mimicry triggering autoimmune neuropathy
C. Toxin-mediated demyelination
D. Genetic predisposition without environmental trigger
B. Molecular mimicry triggering autoimmune neuropathy
Rationale: This presentation is consistent with Guillain-Barré syndrome,
specifically the acute motor axonal neuropathy (AMAN) variant associated with
Campylobacter jejuni infection. Molecular mimicry occurs when bacterial
ganglioside-like antigens induce antibodies that cross-react with host peripheral
nerve gangliosides, causing autoimmune-mediated nerve injury.
9. A patient with chronic renal failure develops metastatic calcification in soft
tissues. Which laboratory finding is most likely responsible?
A. Hypocalcemia with hyperphosphatemia
B. Hypercalcemia with normal phosphate
