Advanced Pathophysiology Exam 1 2026 Edition Actual
Questions and Answers New Version
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
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
,2|Page
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
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
,3|Page
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
D. Improved oxygen extraction by peripheral tissues
Answer:B
, 4|Page
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
C.Psychogenic polydipsia
Questions and Answers New Version
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
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
,2|Page
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
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
,3|Page
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
D. Improved oxygen extraction by peripheral tissues
Answer:B
, 4|Page
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
C.Psychogenic polydipsia
