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NURS 302 PATHOPHYSIOLOGY EXAM 1 2026/2027 |
Complete Solutions Validation | Pass Guaranteed -
A+ Graded
SECTION 1: CELLULAR ADAPTATION, INJURY & DEATH (Q1-10)
Q1. A 72-year-old male patient with a 20-year history of chronic heart failure
presents with increased cardiac output demands. Histological examination
reveals enlarged cardiac muscle cells with increased numbers of myofibrils. The
nurse recognizes this cellular adaptation as:
A. Atrophy
B. Hyperplasia
C. Hypertrophy
D. Metaplasia
Rationale: Hypertrophy is an increase in cell size (not number) resulting in enlarged
tissue mass. Cardiac muscle cells are permanent cells that cannot undergo
hyperplasia (increase in cell number), so they respond to increased workload by
hypertrophy. Atrophy is decrease in size, and metaplasia is replacement of one cell
type by another.
Correct Answer: C
Q2. A postmenopausal woman is found to have endometrial hyperplasia during a
routine biopsy. The pathophysiology of this condition is best explained by:
A. Decreased estrogen stimulation leading to endometrial thinning
B. Unopposed estrogen stimulation causing increased endometrial cell proliferation
C. Progesterone dominance triggering endometrial cell enlargement
D. Metaplastic transformation of endometrial cells to squamous epithelium
,2
Rationale: Endometrial hyperplasia results from unopposed estrogen stimulation
causing increased cell proliferation (hyperplasia). After menopause, if estrogen levels
remain elevated without progesterone opposition, endometrial cells proliferate
excessively. Option A describes atrophy, C confuses progesterone's role (it causes
secretory changes, not proliferation), and D describes metaplasia, which is not the
primary mechanism here.
Correct Answer: B
Q3. A patient with chronic gastroesophageal reflux disease (GERD) develops
Barrett's esophagus. The cellular adaptation occurring in this condition is:
A. Atrophy of the esophageal squamous epithelium
B. Hypertrophy of the esophageal smooth muscle layer
C. Metaplasia of squamous epithelium to columnar epithelium
D. Dysplasia with loss of cellular differentiation
Rationale: Barrett's esophagus is a classic example of metaplasia, where chronic acid
exposure causes the normal squamous epithelium of the esophagus to be replaced
by columnar epithelium (intestinal metaplasia). This is a reversible adaptation that
increases cancer risk but is not yet dysplasia (which involves disordered cell growth
and loss of differentiation). Atrophy and hypertrophy do not describe this
transformation.
Correct Answer: C
Q4. A 45-year-old patient with severe malnutrition and muscle wasting is
experiencing cellular atrophy. The primary mechanism driving this adaptation is:
A. Increased protein synthesis exceeding protein breakdown
B. Decreased protein synthesis and increased protein catabolism
C. Apoptosis of individual muscle fibers
D. Ischemic necrosis of muscle tissue
, 3
Rationale: Atrophy results from decreased protein synthesis and increased protein
degradation (catabolism) via the ubiquitin-proteasome pathway and autophagy. In
malnutrition, lack of amino acid substrate reduces protein synthesis while the body
breaks down muscle proteins for energy. This is distinct from apoptosis
(programmed cell death of individual cells) and necrosis (pathological cell death from
ischemia).
Correct Answer: B
Q5. A patient presents with cervical dysplasia on Pap smear. The nurse
understands that dysplasia is characterized by:
A. Replacement of normal cervical epithelium by intestinal-type epithelium
B. Decrease in the size and number of cervical cells
C. Disordered, dysfunctional cell growth with loss of normal maturation and
differentiation
D. Increase in cell size with preserved normal architecture
Rationale: Dysplasia is characterized by disordered, dysfunctional cell growth with
loss of normal maturation and differentiation, often considered a pre-neoplastic
change. It is not metaplasia (A), atrophy (B), or hypertrophy (D). Dysplasia represents
a disordered architectural and cytological change that may progress to carcinoma if
the stimulus persists.
Correct Answer: C
Q6. A patient who suffered a myocardial infarction 4 hours ago is at risk for
reperfusion injury. The primary mechanism causing cellular damage during
reperfusion is:
A. Restoration of oxygen leading to ATP regeneration
B. Formation of reactive oxygen species (free radicals) causing lipid peroxidation of
cell membranes
C. Accumulation of lactic acid causing intracellular alkalosis
D. Calcium efflux from the mitochondria preventing cell swelling
NURS 302 PATHOPHYSIOLOGY EXAM 1 2026/2027 |
Complete Solutions Validation | Pass Guaranteed -
A+ Graded
SECTION 1: CELLULAR ADAPTATION, INJURY & DEATH (Q1-10)
Q1. A 72-year-old male patient with a 20-year history of chronic heart failure
presents with increased cardiac output demands. Histological examination
reveals enlarged cardiac muscle cells with increased numbers of myofibrils. The
nurse recognizes this cellular adaptation as:
A. Atrophy
B. Hyperplasia
C. Hypertrophy
D. Metaplasia
Rationale: Hypertrophy is an increase in cell size (not number) resulting in enlarged
tissue mass. Cardiac muscle cells are permanent cells that cannot undergo
hyperplasia (increase in cell number), so they respond to increased workload by
hypertrophy. Atrophy is decrease in size, and metaplasia is replacement of one cell
type by another.
Correct Answer: C
Q2. A postmenopausal woman is found to have endometrial hyperplasia during a
routine biopsy. The pathophysiology of this condition is best explained by:
A. Decreased estrogen stimulation leading to endometrial thinning
B. Unopposed estrogen stimulation causing increased endometrial cell proliferation
C. Progesterone dominance triggering endometrial cell enlargement
D. Metaplastic transformation of endometrial cells to squamous epithelium
,2
Rationale: Endometrial hyperplasia results from unopposed estrogen stimulation
causing increased cell proliferation (hyperplasia). After menopause, if estrogen levels
remain elevated without progesterone opposition, endometrial cells proliferate
excessively. Option A describes atrophy, C confuses progesterone's role (it causes
secretory changes, not proliferation), and D describes metaplasia, which is not the
primary mechanism here.
Correct Answer: B
Q3. A patient with chronic gastroesophageal reflux disease (GERD) develops
Barrett's esophagus. The cellular adaptation occurring in this condition is:
A. Atrophy of the esophageal squamous epithelium
B. Hypertrophy of the esophageal smooth muscle layer
C. Metaplasia of squamous epithelium to columnar epithelium
D. Dysplasia with loss of cellular differentiation
Rationale: Barrett's esophagus is a classic example of metaplasia, where chronic acid
exposure causes the normal squamous epithelium of the esophagus to be replaced
by columnar epithelium (intestinal metaplasia). This is a reversible adaptation that
increases cancer risk but is not yet dysplasia (which involves disordered cell growth
and loss of differentiation). Atrophy and hypertrophy do not describe this
transformation.
Correct Answer: C
Q4. A 45-year-old patient with severe malnutrition and muscle wasting is
experiencing cellular atrophy. The primary mechanism driving this adaptation is:
A. Increased protein synthesis exceeding protein breakdown
B. Decreased protein synthesis and increased protein catabolism
C. Apoptosis of individual muscle fibers
D. Ischemic necrosis of muscle tissue
, 3
Rationale: Atrophy results from decreased protein synthesis and increased protein
degradation (catabolism) via the ubiquitin-proteasome pathway and autophagy. In
malnutrition, lack of amino acid substrate reduces protein synthesis while the body
breaks down muscle proteins for energy. This is distinct from apoptosis
(programmed cell death of individual cells) and necrosis (pathological cell death from
ischemia).
Correct Answer: B
Q5. A patient presents with cervical dysplasia on Pap smear. The nurse
understands that dysplasia is characterized by:
A. Replacement of normal cervical epithelium by intestinal-type epithelium
B. Decrease in the size and number of cervical cells
C. Disordered, dysfunctional cell growth with loss of normal maturation and
differentiation
D. Increase in cell size with preserved normal architecture
Rationale: Dysplasia is characterized by disordered, dysfunctional cell growth with
loss of normal maturation and differentiation, often considered a pre-neoplastic
change. It is not metaplasia (A), atrophy (B), or hypertrophy (D). Dysplasia represents
a disordered architectural and cytological change that may progress to carcinoma if
the stimulus persists.
Correct Answer: C
Q6. A patient who suffered a myocardial infarction 4 hours ago is at risk for
reperfusion injury. The primary mechanism causing cellular damage during
reperfusion is:
A. Restoration of oxygen leading to ATP regeneration
B. Formation of reactive oxygen species (free radicals) causing lipid peroxidation of
cell membranes
C. Accumulation of lactic acid causing intracellular alkalosis
D. Calcium efflux from the mitochondria preventing cell swelling
