ADVANCED PATHOPHYSIOLOGY EXAM 1
QUESTIONS AND ANSWERS NEW GRADED A+
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A 59-year-old with longstanding hypertension collapses while gardening. On arrival he’s
unconscious; CT shows a deep intracerebral hemorrhage in the basal ganglia. Chronic
hypertension most likely produced which vascular change that predisposed to this bleed?
A. Atherosclerotic plaque ulceration
B. Lipohyalinosis of small penetrating arteries
C. Mycotic aneurysm formation
D. Arteriovenous malformation rupture
Answer: B
An otherwise healthy young adult suddenly develops severe unilateral calf pain and swelling
after a long flight; duplex ultrasound confirms DVT. Which immediate pathophysiologic
event most increases risk of subsequent pulmonary
embolism?
A. Endothelial proliferation at the thrombus site
B. Embolization of a portion of the venous thrombus into the pulmonary
circulation
C. Conversion of thrombus into organized scar tissue
D. Localized vasospasm within the deep veins
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Answer: B
Serum labs: pH 7.25, HCO₃⁻ 12 mEq/L, PaCO₂ 30 mmHg. A patient with vomiting for 2
days then poor intake presents with these values. Which is the best
interpretation?
A. Primary metabolic acidosis with respiratory compensation
B. Primary metabolic alkalosis with respiratory compensation
C. Primary respiratory acidosis with renal compensation
D. Mixed metabolic alkalosis and respiratory acidosis
Answer: A
A formerly ambulatory patient with sudden onset bilateral lower-limb flaccid paralysis
after a transient diarrheal illness has areflexia and elevated CSF protein with normal cell
count. Which mechanism best explains his neuropathy? A. Autoantibody-mediated
blockade at the neuromuscular junction
B. Immune-mediated demyelination of peripheral nerves (postinfectious)
C. Primary motor neuron degeneration within spinal cord anterior horns
D. Ischemic injury to the peripheral nerve vascular supply
Answer: B
Diffusion-weighted MRI of a stroke patient shows a well-defined embolic infarct in the left
MCA territory. Which physiologic process is most responsible for irreversible neuronal death
in the infarct core?
A. Excessive mitochondrial biogenesis
B. Failure of ATP-dependent ion pumps causing intracellular calcium overload and
excitotoxicity
C. Increased cerebral venous outflow leading to edema
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D. Activation of peripheral immune cells only
Answer: B
A child with severe burns covering 40% total body surface area becomes hypotensive and
tachycardic with rising hematocrit and BUN. Which phenomenon explains these findings?
A. Acute hemolysis releasing intracellular contents
B. Massive third-spacing of plasma into interstitial and burned tissues causing intravascular
hypovolemia
C. Acute hemorrhage into burn wounds causing anemia
D. Cardiogenic shock from myocardial contusion
Answer: B
An older adult with progressive memory loss is found to have neurofibrillary tangles and
beta-amyloid plaques at autopsy. Which pathological process is most implicated in the
synaptic dysfunction observed during life?
A. Diffuse neuronal demyelination
B. Accumulation of misfolded proteins disrupting synaptic signaling
C. Autoimmune attack on NMDA receptors
D. Primary ischemia limited to hippocampal CA1 only
Answer: B
During septic shock a patient becomes hypotensive and warm with high cardiac output but
poor tissue perfusion; lactate rises. What best explains the high lactate despite increased
cardiac output?
A. Reduced hepatic lactate production
B. Microcirculatory shunting and cellular mitochondrial dysfunction leading to impaired
oxygen utilization
C. Excessive aerobic metabolism generating lactate
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D. Improved oxygen extraction by peripheral tissues
Answer: B
A pregnant woman in her third trimester presents with hyperreflexia, proteinuria, and severe
hypertension. Placental histology later reveals abnormal spiral artery remodeling. Which
placental-pathway abnormality precipitates maternal endothelial dysfunction?
A. Excess placental angiogenesis lowering resistance
B. Inadequate trophoblast invasion causing high-resistance uteroplacental circulation and
release of antiangiogenic factors
C. Maternal autoimmune destruction of chorionic villi
D. Bacterial infection of the placenta producing toxins
Answer: B
A 42-year-old with chronic liver disease has progressive jaundice, low albumin, and ascites.
Portal hypertension is documented. Which two mechanisms primarily drive his ascites
formation?
A. Increased hepatic albumin production and peritoneal inflammation
B. Portal hypertension raising hydrostatic pressure plus reduced oncotic pressure from
hypoalbuminemia
C. Increased lymphatic drainage and decreased capillary permeability
D. Excessive renal sodium loss and diuresis
Answer: B
A patient presents with polyuria, low urine osmolality, and hypernatremia. After
administration of desmopressin, urine osmolality increases markedly. Which diagnosis fits
these results?
A. Nephrogenic diabetes insipidus
B. Central diabetes insipidus