NR 283 PATHOPHYSIOLOGY EXAM 1 2026/2027 UPDATED |
Complete Solution with Detailed Rationales | Chamberlain
College of Nursing Prep | Pass Guaranteed - A+ Graded
Unit 1: Cellular Function & Adaptation (20 Questions)
Q1: A 68-year-old male with a 40-year history of smoking presents with a chronic cough
and dyspnea. Chest CT reveals enlarged air spaces with destroyed alveolar walls.
Microscopic examination shows enlarged alveolar spaces with loss of septal tissue.
Which cellular adaptation process is primarily responsible for this pathological change?
A. Hypertrophy of alveolar epithelial cells
B. Hyperplasia of type II pneumocytes
C. Atrophy and destruction of alveolar walls with air space enlargement (emphysema)
[CORRECT]
D. Metaplasia of bronchial epithelium to squamous cells
Correct Answer: C
,Rationale: This patient has emphysema, a form of chronic obstructive pulmonary
disease (COPD) characterized by permanent enlargement of air spaces distal to
terminal bronchioles with destruction of alveolar walls. This represents a pathological
form of tissue destruction rather than true cellular adaptation, though it involves the
loss of cellular and extracellular matrix components. The pathophysiology involves:
● Protease-antiprotease imbalance (alpha-1 antitrypsin deficiency or
smoking-induced inflammation)
● Elastase destruction of alveolar elastic tissue
● Loss of elastic recoil and airway collapse
Why distractors are incorrect:
● A: Hypertrophy refers to increase in cell size, not the destructive process seen
here
● B: Hyperplasia (increase in cell number) occurs in type II pneumocytes during
repair but is not the primary pathology in established emphysema
● D: Metaplasia (change from one differentiated cell type to another) occurs in
smoking (squamous metaplasia), but this describes bronchial changes, not
alveolar destruction
Q2: A 45-year-old woman with chronic gastroesophageal reflux disease (GERD)
undergoes endoscopy. Biopsy reveals columnar epithelium with goblet cells in the distal
esophagus, replacing the normal stratified squamous epithelium. Which cellular
adaptation has occurred?
A. Dysplasia
B. Metaplasia [CORRECT]
,C. Anaplasia
D. Hypertrophy
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another cell type, often as an adaptive response to chronic irritation or inflammation. In
Barrett's esophagus, chronic acid exposure causes the normal stratified squamous
epithelium to be replaced by intestinal-type columnar epithelium with goblet cells. This
is a protective adaptation (better able to withstand acid) but increases cancer risk.
Why distractors are incorrect:
● A: Dysplasia refers to disordered, pre-neoplastic cellular growth with loss of
uniformity and architectural organization
● C: Anaplasia refers to loss of cellular differentiation, characteristic of malignant
cells (undifferentiated, pleomorphic)
● D: Hypertrophy is increase in cell size, not change in cell type
Q3: [Select-All-That-Apply] Which of the following are examples of physiologic cellular
hypertrophy?
A. Uterine enlargement during pregnancy [CORRECT]
B. Cardiac muscle enlargement in response to hypertension
, C. Skeletal muscle enlargement with exercise training [CORRECT]
D. Left ventricular hypertrophy from aortic stenosis
E. Breast tissue enlargement during lactation [CORRECT]
Correct Answer: A, C, E
Rationale: Physiologic hypertrophy is adaptive, reversible enlargement of cells in
response to normal stimulation without underlying pathology:
● A: Uterine smooth muscle hypertrophy under estrogen/progesterone stimulation
during pregnancy (normal physiologic process)
● C: Skeletal muscle fiber hypertrophy from exercise (increased protein synthesis,
mitochondrial biogenesis)
● E: Breast epithelial and stromal hypertrophy during lactation (hormonally
mediated)
Pathologic hypertrophy (incorrect options):
● B: Cardiac hypertrophy from hypertension is pathologic (pressure overload),
though initially compensatory, it leads to decompensation
● D: Aortic stenosis causes pathologic pressure overload hypertrophy with
eventual heart failure risk
Q4: A 55-year-old man with chronic alcoholism presents with hepatomegaly. Liver
biopsy reveals hepatocytes with clear cytoplasmic vacuoles displacing the nucleus to
the periphery. Which cellular process is demonstrated?
Complete Solution with Detailed Rationales | Chamberlain
College of Nursing Prep | Pass Guaranteed - A+ Graded
Unit 1: Cellular Function & Adaptation (20 Questions)
Q1: A 68-year-old male with a 40-year history of smoking presents with a chronic cough
and dyspnea. Chest CT reveals enlarged air spaces with destroyed alveolar walls.
Microscopic examination shows enlarged alveolar spaces with loss of septal tissue.
Which cellular adaptation process is primarily responsible for this pathological change?
A. Hypertrophy of alveolar epithelial cells
B. Hyperplasia of type II pneumocytes
C. Atrophy and destruction of alveolar walls with air space enlargement (emphysema)
[CORRECT]
D. Metaplasia of bronchial epithelium to squamous cells
Correct Answer: C
,Rationale: This patient has emphysema, a form of chronic obstructive pulmonary
disease (COPD) characterized by permanent enlargement of air spaces distal to
terminal bronchioles with destruction of alveolar walls. This represents a pathological
form of tissue destruction rather than true cellular adaptation, though it involves the
loss of cellular and extracellular matrix components. The pathophysiology involves:
● Protease-antiprotease imbalance (alpha-1 antitrypsin deficiency or
smoking-induced inflammation)
● Elastase destruction of alveolar elastic tissue
● Loss of elastic recoil and airway collapse
Why distractors are incorrect:
● A: Hypertrophy refers to increase in cell size, not the destructive process seen
here
● B: Hyperplasia (increase in cell number) occurs in type II pneumocytes during
repair but is not the primary pathology in established emphysema
● D: Metaplasia (change from one differentiated cell type to another) occurs in
smoking (squamous metaplasia), but this describes bronchial changes, not
alveolar destruction
Q2: A 45-year-old woman with chronic gastroesophageal reflux disease (GERD)
undergoes endoscopy. Biopsy reveals columnar epithelium with goblet cells in the distal
esophagus, replacing the normal stratified squamous epithelium. Which cellular
adaptation has occurred?
A. Dysplasia
B. Metaplasia [CORRECT]
,C. Anaplasia
D. Hypertrophy
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another cell type, often as an adaptive response to chronic irritation or inflammation. In
Barrett's esophagus, chronic acid exposure causes the normal stratified squamous
epithelium to be replaced by intestinal-type columnar epithelium with goblet cells. This
is a protective adaptation (better able to withstand acid) but increases cancer risk.
Why distractors are incorrect:
● A: Dysplasia refers to disordered, pre-neoplastic cellular growth with loss of
uniformity and architectural organization
● C: Anaplasia refers to loss of cellular differentiation, characteristic of malignant
cells (undifferentiated, pleomorphic)
● D: Hypertrophy is increase in cell size, not change in cell type
Q3: [Select-All-That-Apply] Which of the following are examples of physiologic cellular
hypertrophy?
A. Uterine enlargement during pregnancy [CORRECT]
B. Cardiac muscle enlargement in response to hypertension
, C. Skeletal muscle enlargement with exercise training [CORRECT]
D. Left ventricular hypertrophy from aortic stenosis
E. Breast tissue enlargement during lactation [CORRECT]
Correct Answer: A, C, E
Rationale: Physiologic hypertrophy is adaptive, reversible enlargement of cells in
response to normal stimulation without underlying pathology:
● A: Uterine smooth muscle hypertrophy under estrogen/progesterone stimulation
during pregnancy (normal physiologic process)
● C: Skeletal muscle fiber hypertrophy from exercise (increased protein synthesis,
mitochondrial biogenesis)
● E: Breast epithelial and stromal hypertrophy during lactation (hormonally
mediated)
Pathologic hypertrophy (incorrect options):
● B: Cardiac hypertrophy from hypertension is pathologic (pressure overload),
though initially compensatory, it leads to decompensation
● D: Aortic stenosis causes pathologic pressure overload hypertrophy with
eventual heart failure risk
Q4: A 55-year-old man with chronic alcoholism presents with hepatomegaly. Liver
biopsy reveals hepatocytes with clear cytoplasmic vacuoles displacing the nucleus to
the periphery. Which cellular process is demonstrated?
