BIO322 Applied Pathophysiology Exam Bundle
(2025/2026) - All Exams 1-4 Practice Tests
with Verified Solutions
======================================================
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EXAM 1 – Foundations of Pathophysiology (50 questions)
SECTION A – Cellular & Molecular Basis (20 Q)
A1. Cellular Injury & Adaptation (7 Q)
Q1.
A 68-year-old male with a 50-pack-year history presents with persistent productive
cough and weight loss. Chest CT reveals a 2.5 cm spiculated mass. Biopsy shows
disorganized sheets of pleomorphic cells with high nuclear-to-cytoplasmic ratios and
numerous mitoses. Which cellular alteration is the most reliable indicator of
malignancy?
A. Cellular pleomorphism
B. High mitotic rate
C. Anaplasia
D. Metastatic spread
,Answer: C – Anaplasia (loss of differentiation) is the hallmark of malignancy.
Rationale: While pleomorphism and mitoses support malignancy, anaplasia reflects the
fundamental loss of structural and functional differentiation. Metastasis is definitive but
may not be present early. (Ref: Robbins 2025)
Q2.
A patient with septic shock develops acute kidney injury. Urinalysis shows muddy-brown
granular casts. Which type of cellular injury is most likely?
A. Apoptosis
B. Necrosis
C. Autophagy
D. Metaplasia
Answer: B – Necrosis (coagulative in renal tubules) produces cellular debris cast in
urine.
Rationale: Septic hypotension → ATP depletion → membrane failure → necrosis.
Apoptosis is programmed and energy-dependent; casts are not seen.
Q3.
A 45-year-old female with BRCA1 mutation undergoes prophylactic mastectomy.
Microscopy reveals atypical ductal hyperplasia. This represents which adaptive cellular
change?
A. Hypertrophy
B. Hyperplasia
,C. Metaplasia
D. Dysplasia
Answer: D – Dysplasia (disordered growth) is pre-neoplastic.
Rationale: BRCA1 impairs DNA repair → genomic instability → dysplasia precedes
carcinoma in situ.
Q4.
A bodybuilder develops cardiac hypertrophy. Which signaling pathway is primarily
responsible?
A. mTOR-mediated protein synthesis
B. Ubiquitin-proteasome degradation
C. Caspase activation
D. Autophagy induction
Answer: A – Mechanical stretch activates mTOR → sarcomere addition.
Rationale: Physiologic hypertrophy requires increased contractile proteins; mTOR
integrates growth signals.
Q5.
A smoker’s bronchial epithelium changes from columnar to squamous. This is:
A. Hypertrophy
B. Hyperplasia
, C. Metaplasia
D. Anaplasia
Answer: C – Metaplasia (reversible change in differentiation).
Rationale: Chronic irritation → reserve cell differentiation → squamous metaplasia;
protective but predisposes to dysplasia.
Q6.
A 70-year-old man undergoes orchiectomy for prostate cancer. Histology shows
abundant lipofuscin in Leydig cells. This pigment is a marker of:
A. Hemosiderosis
B. Lipid peroxidation
C. Melanin deposition
D. Copper overload
Answer: B – Lipofuscin = indigestible oxidized lipid residue from autophagy.
Rationale: “Wear-and-tear” pigment common in elderly; reflects free-radical injury.
Q7.
SATA. Which cellular events characterize apoptosis? (Select all that apply.)
A. Chromatin condensation
B. Cell swelling
C. Caspase activation
(2025/2026) - All Exams 1-4 Practice Tests
with Verified Solutions
======================================================
============
EXAM 1 – Foundations of Pathophysiology (50 questions)
SECTION A – Cellular & Molecular Basis (20 Q)
A1. Cellular Injury & Adaptation (7 Q)
Q1.
A 68-year-old male with a 50-pack-year history presents with persistent productive
cough and weight loss. Chest CT reveals a 2.5 cm spiculated mass. Biopsy shows
disorganized sheets of pleomorphic cells with high nuclear-to-cytoplasmic ratios and
numerous mitoses. Which cellular alteration is the most reliable indicator of
malignancy?
A. Cellular pleomorphism
B. High mitotic rate
C. Anaplasia
D. Metastatic spread
,Answer: C – Anaplasia (loss of differentiation) is the hallmark of malignancy.
Rationale: While pleomorphism and mitoses support malignancy, anaplasia reflects the
fundamental loss of structural and functional differentiation. Metastasis is definitive but
may not be present early. (Ref: Robbins 2025)
Q2.
A patient with septic shock develops acute kidney injury. Urinalysis shows muddy-brown
granular casts. Which type of cellular injury is most likely?
A. Apoptosis
B. Necrosis
C. Autophagy
D. Metaplasia
Answer: B – Necrosis (coagulative in renal tubules) produces cellular debris cast in
urine.
Rationale: Septic hypotension → ATP depletion → membrane failure → necrosis.
Apoptosis is programmed and energy-dependent; casts are not seen.
Q3.
A 45-year-old female with BRCA1 mutation undergoes prophylactic mastectomy.
Microscopy reveals atypical ductal hyperplasia. This represents which adaptive cellular
change?
A. Hypertrophy
B. Hyperplasia
,C. Metaplasia
D. Dysplasia
Answer: D – Dysplasia (disordered growth) is pre-neoplastic.
Rationale: BRCA1 impairs DNA repair → genomic instability → dysplasia precedes
carcinoma in situ.
Q4.
A bodybuilder develops cardiac hypertrophy. Which signaling pathway is primarily
responsible?
A. mTOR-mediated protein synthesis
B. Ubiquitin-proteasome degradation
C. Caspase activation
D. Autophagy induction
Answer: A – Mechanical stretch activates mTOR → sarcomere addition.
Rationale: Physiologic hypertrophy requires increased contractile proteins; mTOR
integrates growth signals.
Q5.
A smoker’s bronchial epithelium changes from columnar to squamous. This is:
A. Hypertrophy
B. Hyperplasia
, C. Metaplasia
D. Anaplasia
Answer: C – Metaplasia (reversible change in differentiation).
Rationale: Chronic irritation → reserve cell differentiation → squamous metaplasia;
protective but predisposes to dysplasia.
Q6.
A 70-year-old man undergoes orchiectomy for prostate cancer. Histology shows
abundant lipofuscin in Leydig cells. This pigment is a marker of:
A. Hemosiderosis
B. Lipid peroxidation
C. Melanin deposition
D. Copper overload
Answer: B – Lipofuscin = indigestible oxidized lipid residue from autophagy.
Rationale: “Wear-and-tear” pigment common in elderly; reflects free-radical injury.
Q7.
SATA. Which cellular events characterize apoptosis? (Select all that apply.)
A. Chromatin condensation
B. Cell swelling
C. Caspase activation
