NURS 5315 Advanced Pathophysiology
ACTUAL EXAM 2025/2026 | UTA |
Exam 1 Practice Test | Latest Update |
Verified Q&A | Pass Guaranteed - A+
Graded
SECTION 1: CELLULAR ADAPTATION, INJURY, AND DEATH
(30 Questions)
Q1: A 68-year-old male with chronic heart failure presents with decreased muscle mass in his
lower extremities. Histological examination reveals decreased cell size with preserved cell
number. This cellular adaptation is best described as:
A. Hypertrophy due to increased workload demands
B. Hyperplasia from compensatory mechanisms
C. Atrophy from decreased protein synthesis and increased autophagy [CORRECT]
D. Metaplasia secondary to chronic ischemic changes
Correct Answer: C
Rationale: Atrophy represents a decrease in cell size resulting from reduced protein synthesis
and increased protein degradation via the ubiquitin-proteasome system and autophagy. In this
patient with heart failure, skeletal muscle atrophy (cachexia) occurs due to multiple
mechanisms: decreased anabolic signaling (IGF-1/Akt/mTOR pathway downregulation),
increased catabolic signaling (cytokine-mediated activation of NF-κB and FOXO transcription
factors), reduced blood flow, and malnutrition. The preserved cell number distinguishes
atrophy from hypoplasia/aplasia. Unlike hypertrophy (increased cell size) or hyperplasia
(increased cell number), atrophy reflects cellular "downsizing" to reduce metabolic demands.
Metaplasia involves conversion to a different cell type, not relevant here.
,UTA Note: Graduate-level focus on molecular mechanisms—understand that atrophy involves
both decreased protein synthesis AND increased autophagy-lysosomal and proteasomal
degradation pathways.
Q2: A patient with poorly controlled hypertension develops left ventricular wall thickening
without chamber dilation. The cellular mechanism driving this adaptation involves:
A. Permanent cell cycle entry and mitotic division
B. Increased synthesis of contractile proteins without cell division [CORRECT]
C. Replacement of cardiomyocytes with fibroblasts
D. Apoptosis of terminally differentiated cells with regeneration
Correct Answer: B
Rationale: Cardiac hypertrophy represents increased cell size (hypertrophy) without cell
division, as adult cardiomyocytes are terminally differentiated and rarely undergo mitosis.
Chronic pressure overload (hypertension) triggers mechanotransduction pathways where
mechanical stretch activates phospholipase C, generating IP3 and DAG. This increases
cytosolic calcium, activating calcineurin-NFAT signaling and MAPK pathways. These
transcriptional programs upregulate "fetal gene" expression (β-myosin heavy chain, atrial
natriuretic peptide) and increase sarcomere assembly. The result is concentric
hypertrophy—thickened walls, normal chamber size, and preserved ejection fraction initially.
Unlike hyperplasia (which requires cell division), hypertrophy in permanent cells involves
increased protein synthesis and organelle biogenesis without DNA replication.
UTA Note: Distinguish physiologic vs. pathologic hypertrophy. Pathologic hypertrophy
eventually decompensates due to reduced capillary density, increased fibrosis, and
mitochondrial dysfunction.
Q3: A 45-year-old woman with gastroesophageal reflux disease develops Barrett's esophagus.
This represents which cellular adaptation?
A. Dysplasia with nuclear atypia
B. Metaplasia with conversion to intestinal-type epithelium [CORRECT]
C. Hyperplasia with increased cell number
D. Anaplasia with loss of differentiation
,Correct Answer: B
Rationale: Barrett's esophagus exemplifies metaplasia—the reversible replacement of one
differentiated cell type with another. Chronic acid exposure damages squamous epithelium,
triggering inflammatory cytokines (IL-1β, TNF-α) and growth factors (EGF, TGF-α) that activate
stem cells in the basal layer. These multipotent cells differentiate into columnar
intestinal-type epithelium containing goblet cells, which are more acid-resistant. This
represents an adaptive response that, while protective against acid, increases cancer risk
through the metaplasia-dysplasia-carcinoma sequence. The presence of goblet cells
distinguishes intestinal metaplasia from simple gastric metaplasia. Unlike dysplasia
(disordered growth with nuclear atypia) or anaplasia (undifferentiated, malignant-appearing
cells), metaplasia maintains normal cellular architecture without significant atypia.
UTA Note: Metaplasia is reversible if the stimulus is removed. However, the genetic
reprogramming involved creates a field defect that predisposes to neoplastic transformation.
Q4: Which of the following best describes the cellular mechanism of endometrial hyperplasia
in a 52-year-old woman with unopposed estrogen exposure?
A. Decreased apoptosis of glandular cells
B. Increased mitotic activity of estrogen-responsive cells [CORRECT]
C. Hypertrophy of stromal cells without glandular changes
D. Metaplasia of endometrial to cervical epithelium
Correct Answer: B
Rationale: Endometrial hyperplasia represents increased cell number (hyperplasia) driven by
unopposed estrogen stimulation. Estrogen binds nuclear receptors, activating transcription
of cyclins D1 and E, which promote G1/S phase transition and cell cycle progression.
Simultaneously, estrogen upregulates growth factors (IGF-1, EGF, TGF-α) and their receptors,
creating autocrine/paracrine stimulation loops. Unlike hypertrophy (enlarged cells),
hyperplasia involves actual cell division, measurable by increased Ki-67 proliferation index.
The "unopposed" nature (without progesterone's anti-proliferative and pro-apoptotic effects)
allows continued proliferation. Simple hyperplasia shows increased gland-to-stroma ratio;
complex hyperplasia adds architectural complexity; atypical hyperplasia includes cytologic
atypia with highest malignant potential.
UTA Note: Graduate-level understanding requires recognizing that hyperplasia and
hypertrophy often coexist (as in pregnancy), but pure hyperplasia occurs in labile cells
capable of division.
, Q5: A liver biopsy from a patient with chronic alcohol abuse shows Mallory-Denk bodies,
ballooning degeneration, and neutrophilic infiltrates. These findings represent:
A. Reversible cell injury with accumulation of cytoskeletal proteins
B. Irreversible injury with cytoskeleton disruption and inflammation [CORRECT]
C. Apoptotic cell death with caspase activation
D. Physiologic adaptation to increased metabolic demand
Correct Answer: B
Rationale: These histological findings indicate irreversible hepatocyte injury characteristic of
alcoholic hepatitis. Mallory-Denk bodies represent aggregated, ubiquitinated cytokeratin
intermediate filaments (primarily CK8/18) resulting from cytoskeleton disruption and
impaired protein processing. Ballooning degeneration reflects impaired cellular volume
regulation due to ATP depletion, cytoskeleton damage, and membrane pump failure. The
neutrophilic infiltrate responds to hepatocyte release of damage-associated molecular
patterns (DAMPs). These changes indicate cells have crossed the point of no return—while
individual cells may undergo apoptosis, the pattern represents necrotic injury. The
mechanisms involve alcohol metabolism (acetaldehyde adduct formation, reactive oxygen
species via CYP2E1), mitochondrial damage, and endotoxin-mediated cytokine release
(TNF-α, IL-6).
UTA Note: Distinguish reversible injury (cellular swelling, fatty change) from irreversible injury
(membrane damage, nuclear changes, cytoskeleton disruption). Mallory bodies are
pathognomonic for irreversible injury in this context.
Q6: During myocardial ischemia, the earliest ultrastructural change observable by electron
microscopy is:
A. Nuclear pyknosis and karyorrhexis
B. Mitochondrial swelling with loss of cristae
C. Cellular swelling with bleb formation [CORRECT]
D. Lysosomal rupture with enzymatic digestion
Correct Answer: C
ACTUAL EXAM 2025/2026 | UTA |
Exam 1 Practice Test | Latest Update |
Verified Q&A | Pass Guaranteed - A+
Graded
SECTION 1: CELLULAR ADAPTATION, INJURY, AND DEATH
(30 Questions)
Q1: A 68-year-old male with chronic heart failure presents with decreased muscle mass in his
lower extremities. Histological examination reveals decreased cell size with preserved cell
number. This cellular adaptation is best described as:
A. Hypertrophy due to increased workload demands
B. Hyperplasia from compensatory mechanisms
C. Atrophy from decreased protein synthesis and increased autophagy [CORRECT]
D. Metaplasia secondary to chronic ischemic changes
Correct Answer: C
Rationale: Atrophy represents a decrease in cell size resulting from reduced protein synthesis
and increased protein degradation via the ubiquitin-proteasome system and autophagy. In this
patient with heart failure, skeletal muscle atrophy (cachexia) occurs due to multiple
mechanisms: decreased anabolic signaling (IGF-1/Akt/mTOR pathway downregulation),
increased catabolic signaling (cytokine-mediated activation of NF-κB and FOXO transcription
factors), reduced blood flow, and malnutrition. The preserved cell number distinguishes
atrophy from hypoplasia/aplasia. Unlike hypertrophy (increased cell size) or hyperplasia
(increased cell number), atrophy reflects cellular "downsizing" to reduce metabolic demands.
Metaplasia involves conversion to a different cell type, not relevant here.
,UTA Note: Graduate-level focus on molecular mechanisms—understand that atrophy involves
both decreased protein synthesis AND increased autophagy-lysosomal and proteasomal
degradation pathways.
Q2: A patient with poorly controlled hypertension develops left ventricular wall thickening
without chamber dilation. The cellular mechanism driving this adaptation involves:
A. Permanent cell cycle entry and mitotic division
B. Increased synthesis of contractile proteins without cell division [CORRECT]
C. Replacement of cardiomyocytes with fibroblasts
D. Apoptosis of terminally differentiated cells with regeneration
Correct Answer: B
Rationale: Cardiac hypertrophy represents increased cell size (hypertrophy) without cell
division, as adult cardiomyocytes are terminally differentiated and rarely undergo mitosis.
Chronic pressure overload (hypertension) triggers mechanotransduction pathways where
mechanical stretch activates phospholipase C, generating IP3 and DAG. This increases
cytosolic calcium, activating calcineurin-NFAT signaling and MAPK pathways. These
transcriptional programs upregulate "fetal gene" expression (β-myosin heavy chain, atrial
natriuretic peptide) and increase sarcomere assembly. The result is concentric
hypertrophy—thickened walls, normal chamber size, and preserved ejection fraction initially.
Unlike hyperplasia (which requires cell division), hypertrophy in permanent cells involves
increased protein synthesis and organelle biogenesis without DNA replication.
UTA Note: Distinguish physiologic vs. pathologic hypertrophy. Pathologic hypertrophy
eventually decompensates due to reduced capillary density, increased fibrosis, and
mitochondrial dysfunction.
Q3: A 45-year-old woman with gastroesophageal reflux disease develops Barrett's esophagus.
This represents which cellular adaptation?
A. Dysplasia with nuclear atypia
B. Metaplasia with conversion to intestinal-type epithelium [CORRECT]
C. Hyperplasia with increased cell number
D. Anaplasia with loss of differentiation
,Correct Answer: B
Rationale: Barrett's esophagus exemplifies metaplasia—the reversible replacement of one
differentiated cell type with another. Chronic acid exposure damages squamous epithelium,
triggering inflammatory cytokines (IL-1β, TNF-α) and growth factors (EGF, TGF-α) that activate
stem cells in the basal layer. These multipotent cells differentiate into columnar
intestinal-type epithelium containing goblet cells, which are more acid-resistant. This
represents an adaptive response that, while protective against acid, increases cancer risk
through the metaplasia-dysplasia-carcinoma sequence. The presence of goblet cells
distinguishes intestinal metaplasia from simple gastric metaplasia. Unlike dysplasia
(disordered growth with nuclear atypia) or anaplasia (undifferentiated, malignant-appearing
cells), metaplasia maintains normal cellular architecture without significant atypia.
UTA Note: Metaplasia is reversible if the stimulus is removed. However, the genetic
reprogramming involved creates a field defect that predisposes to neoplastic transformation.
Q4: Which of the following best describes the cellular mechanism of endometrial hyperplasia
in a 52-year-old woman with unopposed estrogen exposure?
A. Decreased apoptosis of glandular cells
B. Increased mitotic activity of estrogen-responsive cells [CORRECT]
C. Hypertrophy of stromal cells without glandular changes
D. Metaplasia of endometrial to cervical epithelium
Correct Answer: B
Rationale: Endometrial hyperplasia represents increased cell number (hyperplasia) driven by
unopposed estrogen stimulation. Estrogen binds nuclear receptors, activating transcription
of cyclins D1 and E, which promote G1/S phase transition and cell cycle progression.
Simultaneously, estrogen upregulates growth factors (IGF-1, EGF, TGF-α) and their receptors,
creating autocrine/paracrine stimulation loops. Unlike hypertrophy (enlarged cells),
hyperplasia involves actual cell division, measurable by increased Ki-67 proliferation index.
The "unopposed" nature (without progesterone's anti-proliferative and pro-apoptotic effects)
allows continued proliferation. Simple hyperplasia shows increased gland-to-stroma ratio;
complex hyperplasia adds architectural complexity; atypical hyperplasia includes cytologic
atypia with highest malignant potential.
UTA Note: Graduate-level understanding requires recognizing that hyperplasia and
hypertrophy often coexist (as in pregnancy), but pure hyperplasia occurs in labile cells
capable of division.
, Q5: A liver biopsy from a patient with chronic alcohol abuse shows Mallory-Denk bodies,
ballooning degeneration, and neutrophilic infiltrates. These findings represent:
A. Reversible cell injury with accumulation of cytoskeletal proteins
B. Irreversible injury with cytoskeleton disruption and inflammation [CORRECT]
C. Apoptotic cell death with caspase activation
D. Physiologic adaptation to increased metabolic demand
Correct Answer: B
Rationale: These histological findings indicate irreversible hepatocyte injury characteristic of
alcoholic hepatitis. Mallory-Denk bodies represent aggregated, ubiquitinated cytokeratin
intermediate filaments (primarily CK8/18) resulting from cytoskeleton disruption and
impaired protein processing. Ballooning degeneration reflects impaired cellular volume
regulation due to ATP depletion, cytoskeleton damage, and membrane pump failure. The
neutrophilic infiltrate responds to hepatocyte release of damage-associated molecular
patterns (DAMPs). These changes indicate cells have crossed the point of no return—while
individual cells may undergo apoptosis, the pattern represents necrotic injury. The
mechanisms involve alcohol metabolism (acetaldehyde adduct formation, reactive oxygen
species via CYP2E1), mitochondrial damage, and endotoxin-mediated cytokine release
(TNF-α, IL-6).
UTA Note: Distinguish reversible injury (cellular swelling, fatty change) from irreversible injury
(membrane damage, nuclear changes, cytoskeleton disruption). Mallory bodies are
pathognomonic for irreversible injury in this context.
Q6: During myocardial ischemia, the earliest ultrastructural change observable by electron
microscopy is:
A. Nuclear pyknosis and karyorrhexis
B. Mitochondrial swelling with loss of cristae
C. Cellular swelling with bleb formation [CORRECT]
D. Lysosomal rupture with enzymatic digestion
Correct Answer: C
