NURS 6501 ADVANCED PATHOPHYSIOLOGY FINAL EXAM
WEEK 11 2026/2027 | Latest Version | Already Graded A |
Walden University | Pass Guaranteed - A+ Graded
Section 1: Cellular Function & Genetics (Q1-12)
Q1. A 68-year-old patient with a history of chronic heart failure has developed reduced
muscle mass and wasting of the quadriceps. This cellular adaptation is BEST described
as:
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C [CORRECT]
Rationale: Atrophy is a decrease in cell size resulting in reduced tissue/organ mass,
commonly seen in skeletal muscle due to disuse, denervation, malnutrition, or
decreased workload in chronic illness. Hypertrophy (A) is increased cell size.
Hyperplasia (B) is increased cell number. Metaplasia (D) is the reversible replacement
of one differentiated cell type with another, typically in response to chronic irritation.
Q2. A patient with chronic gastroesophageal reflux disease develops Barrett's
esophagus, where squamous epithelium is replaced by columnar epithelium. This
cellular adaptation is classified as:
A. Dysplasia
B. Metaplasia
,C. Hyperplasia
D. Anaplasia
Correct Answer: B [CORRECT]
Rationale: Metaplasia is the reversible replacement of one mature differentiated cell
type with another mature cell type better suited to withstand an adverse
environment—here, acid-resistant columnar epithelium replacing acid-sensitive
squamous epithelium. Dysplasia (A) refers to disordered, pre-neoplastic cellular
growth. Hyperplasia (C) is increased cell number. Anaplasia (D) indicates loss of
differentiation in malignant cells.
Q3. In hypoxic cell injury, which event occurs FIRST in the sequence of
pathophysiological changes?
A. Decreased ATP synthesis
B. Increased cell membrane permeability
C. Influx of calcium ions
D. Mitochondrial swelling
Correct Answer: A [CORRECT]
Rationale: Hypoxia impairs oxidative phosphorylation, leading to decreased ATP
synthesis as the initial and most critical event. This triggers downstream effects
including failure of the Na⁺/K⁺-ATPase pump, increased membrane permeability (B),
calcium influx (C), and mitochondrial swelling (D). Without ATP, all energy-dependent
cellular functions fail.
Q4. A patient who suffered a myocardial infarction 3 days ago has an area of preserved
tissue architecture with loss of nuclei and eosinophilic cytoplasm. This type of cell death
is BEST described as:
A. Liquefactive necrosis
B. Coagulative necrosis
,C. Caseous necrosis
D. Fat necrosis
Correct Answer: B [CORRECT]
Rationale: Coagulative necrosis is characteristic of ischemic injury in solid organs
(heart, kidney, liver, spleen) where protein denervation preserves tissue architecture
temporarily while cells lose nuclei and become eosinophilic. Liquefactive necrosis (A)
occurs in the brain and abscesses. Caseous necrosis (C) is seen in tuberculosis. Fat
necrosis (D) occurs in pancreatitis and breast trauma.
Q5. A patient with acute pancreatitis develops chalky white deposits in the
peripancreatic fat. Microscopically, these show shadowy outlines of necrotic adipocytes
with calcium deposits. This represents:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Fat necrosis
D. Gangrenous necrosis
Correct Answer: C [CORRECT]
Rationale: Fat necrosis occurs when lipases (released in pancreatitis or from breast
trauma) hydrolyze triglycerides into fatty acids, which combine with calcium to form
chalky white soaps (saponification). Coagulative necrosis (A) preserves architecture.
Liquefactive necrosis (B) involves enzymatic dissolution. Gangrenous necrosis (D)
refers to ischemic necrosis of a limb, typically coagulative (dry) or with bacterial
infection (wet).
Q6. A 25-year-old patient develops bilateral hand weakness and fasciculations. Genetic
testing reveals a CAG trinucleotide repeat expansion on chromosome 4. This mutation is
associated with:
, A. Fragile X syndrome
B. Huntington's disease
C. Duchenne muscular dystrophy
D. Cystic fibrosis
Correct Answer: B [CORRECT]
Rationale: Huntington's disease is an autosomal dominant disorder caused by CAG
trinucleotide repeat expansion in the HTT gene on chromosome 4, leading to neuronal
degeneration in the striatum. Fragile X syndrome (A) is caused by CGG repeat expansion
in FMR1. Duchenne MD (C) is X-linked recessive due to dystrophin gene deletion. Cystic
fibrosis (D) is autosomal recessive due to CFTR mutations.
Q7. Which inheritance pattern is demonstrated by a disorder that affects males
primarily, is transmitted by carrier females, and shows no male-to-male transmission?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked recessive
D. Mitochondrial
Correct Answer: C [CORRECT]
Rationale: X-linked recessive inheritance affects males predominantly (hemizygous for
the X chromosome), is transmitted by carrier females (heterozygous), and shows no
male-to-male transmission (fathers pass Y chromosome to sons). Examples include
hemophilia A, Duchenne MD, and G6PD deficiency. Autosomal dominant (A) and
recessive (B) affect both sexes equally. Mitochondrial (D) shows maternal inheritance
only.
Q8. A newborn is diagnosed with cystic fibrosis. Both parents are phenotypically
normal. This inheritance pattern is BEST described as:
WEEK 11 2026/2027 | Latest Version | Already Graded A |
Walden University | Pass Guaranteed - A+ Graded
Section 1: Cellular Function & Genetics (Q1-12)
Q1. A 68-year-old patient with a history of chronic heart failure has developed reduced
muscle mass and wasting of the quadriceps. This cellular adaptation is BEST described
as:
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C [CORRECT]
Rationale: Atrophy is a decrease in cell size resulting in reduced tissue/organ mass,
commonly seen in skeletal muscle due to disuse, denervation, malnutrition, or
decreased workload in chronic illness. Hypertrophy (A) is increased cell size.
Hyperplasia (B) is increased cell number. Metaplasia (D) is the reversible replacement
of one differentiated cell type with another, typically in response to chronic irritation.
Q2. A patient with chronic gastroesophageal reflux disease develops Barrett's
esophagus, where squamous epithelium is replaced by columnar epithelium. This
cellular adaptation is classified as:
A. Dysplasia
B. Metaplasia
,C. Hyperplasia
D. Anaplasia
Correct Answer: B [CORRECT]
Rationale: Metaplasia is the reversible replacement of one mature differentiated cell
type with another mature cell type better suited to withstand an adverse
environment—here, acid-resistant columnar epithelium replacing acid-sensitive
squamous epithelium. Dysplasia (A) refers to disordered, pre-neoplastic cellular
growth. Hyperplasia (C) is increased cell number. Anaplasia (D) indicates loss of
differentiation in malignant cells.
Q3. In hypoxic cell injury, which event occurs FIRST in the sequence of
pathophysiological changes?
A. Decreased ATP synthesis
B. Increased cell membrane permeability
C. Influx of calcium ions
D. Mitochondrial swelling
Correct Answer: A [CORRECT]
Rationale: Hypoxia impairs oxidative phosphorylation, leading to decreased ATP
synthesis as the initial and most critical event. This triggers downstream effects
including failure of the Na⁺/K⁺-ATPase pump, increased membrane permeability (B),
calcium influx (C), and mitochondrial swelling (D). Without ATP, all energy-dependent
cellular functions fail.
Q4. A patient who suffered a myocardial infarction 3 days ago has an area of preserved
tissue architecture with loss of nuclei and eosinophilic cytoplasm. This type of cell death
is BEST described as:
A. Liquefactive necrosis
B. Coagulative necrosis
,C. Caseous necrosis
D. Fat necrosis
Correct Answer: B [CORRECT]
Rationale: Coagulative necrosis is characteristic of ischemic injury in solid organs
(heart, kidney, liver, spleen) where protein denervation preserves tissue architecture
temporarily while cells lose nuclei and become eosinophilic. Liquefactive necrosis (A)
occurs in the brain and abscesses. Caseous necrosis (C) is seen in tuberculosis. Fat
necrosis (D) occurs in pancreatitis and breast trauma.
Q5. A patient with acute pancreatitis develops chalky white deposits in the
peripancreatic fat. Microscopically, these show shadowy outlines of necrotic adipocytes
with calcium deposits. This represents:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Fat necrosis
D. Gangrenous necrosis
Correct Answer: C [CORRECT]
Rationale: Fat necrosis occurs when lipases (released in pancreatitis or from breast
trauma) hydrolyze triglycerides into fatty acids, which combine with calcium to form
chalky white soaps (saponification). Coagulative necrosis (A) preserves architecture.
Liquefactive necrosis (B) involves enzymatic dissolution. Gangrenous necrosis (D)
refers to ischemic necrosis of a limb, typically coagulative (dry) or with bacterial
infection (wet).
Q6. A 25-year-old patient develops bilateral hand weakness and fasciculations. Genetic
testing reveals a CAG trinucleotide repeat expansion on chromosome 4. This mutation is
associated with:
, A. Fragile X syndrome
B. Huntington's disease
C. Duchenne muscular dystrophy
D. Cystic fibrosis
Correct Answer: B [CORRECT]
Rationale: Huntington's disease is an autosomal dominant disorder caused by CAG
trinucleotide repeat expansion in the HTT gene on chromosome 4, leading to neuronal
degeneration in the striatum. Fragile X syndrome (A) is caused by CGG repeat expansion
in FMR1. Duchenne MD (C) is X-linked recessive due to dystrophin gene deletion. Cystic
fibrosis (D) is autosomal recessive due to CFTR mutations.
Q7. Which inheritance pattern is demonstrated by a disorder that affects males
primarily, is transmitted by carrier females, and shows no male-to-male transmission?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked recessive
D. Mitochondrial
Correct Answer: C [CORRECT]
Rationale: X-linked recessive inheritance affects males predominantly (hemizygous for
the X chromosome), is transmitted by carrier females (heterozygous), and shows no
male-to-male transmission (fathers pass Y chromosome to sons). Examples include
hemophilia A, Duchenne MD, and G6PD deficiency. Autosomal dominant (A) and
recessive (B) affect both sexes equally. Mitochondrial (D) shows maternal inheritance
only.
Q8. A newborn is diagnosed with cystic fibrosis. Both parents are phenotypically
normal. This inheritance pattern is BEST described as:
