GCU BIO 322 Final Exam Applied
Pathophysiology Official Practice Exam Actual
Exam 2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
══════════════════════════════════════
SECTION 1: CARDIOVASCULAR & HEMATOLOGIC PATHOPHYSIOLOGY Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 62-year-old man with hypertension and hyperlipidemia presents with crushing substernal
chest pain radiating to his left arm. Troponin I is elevated. Which cellular mechanism best
explains the irreversible myocardial damage occurring in this patient?
A. Reversible ischemia causing temporary ATP depletion
B. Coronary vasospasm without underlying plaque rupture
C. Plaque rupture triggering thrombus formation and transmural necrosis ✓ CORRECT
D. Stable angina from fixed coronary stenosis
Correct Answer: C
Rationale: Plaque rupture exposes thrombogenic subendothelial collagen, triggering platelet
aggregation and fibrin clot formation that occludes the coronary artery, causing transmural
myocardial necrosis characteristic of STEMI. Stable angina involves fixed stenosis without
plaque disruption and does not cause irreversible necrosis or elevated troponins. The
distinction between reversible ischemia and infarction hinges on the duration of occlusion
and the presence of biomarker elevation.
Question 2 of 50
A 58-year-old woman with a history of type 2 diabetes presents with dyspnea on exertion,
orthopnea, and bilateral crackles. Her JVP is elevated. Which hemodynamic alteration best
explains her pulmonary symptoms?
A. Left ventricular systolic dysfunction causing increased pulmonary capillary hydrostatic
pressure ✓ CORRECT
B. Right ventricular failure leading to systemic venous congestion
,C. High-output cardiac failure from uncontrolled hyperthyroidism
D. Diastolic dysfunction from restrictive cardiomyopathy
Correct Answer: A
Rationale: Left-sided heart failure produces backward failure, elevating left atrial and
pulmonary capillary pressures, which forces fluid into alveolar spaces and manifests as
pulmonary edema and crackles. Right-sided failure primarily causes systemic venous
congestion such as hepatomegaly and peripheral edema rather than pulmonary symptoms.
The orthopnea and exertional dyspnea reflect the gravitational redistribution of fluid when
supine and increased metabolic demand.
Question 3 of 50
A 45-year-old man with a 20-year history of alcohol use presents with biventricular dilation,
reduced ejection fraction, and S3 gallop. Which pathophysiologic process underlies his
cardiomyopathy?
A. Disseminated myocardial fiber hypertrophy with outflow obstruction
B. Direct toxic myocyte injury and apoptosis leading to ventricular dilation ✓ CORRECT
C. Endomyocardial fibrosis impairing ventricular relaxation
D. Ischemic scarring from coronary atherosclerosis
Correct Answer: B
Rationale: Dilated cardiomyopathy in chronic alcohol abuse results from ethanol and its
metabolite acetaldehyde inducing oxidative stress, mitochondrial dysfunction, and
cardiomyocyte apoptosis, producing four-chamber dilation and systolic failure. Hypertrophic
cardiomyopathy involves sarcomeric mutations causing asymmetric septal thickening and
outflow obstruction, not dilation. Ischemic cardiomyopathy requires significant coronary
disease, which is not described here.
Question 4 of 50
A 28-year-old woman at 32 weeks gestation develops sudden dyspnea, fatigue, and peripheral
edema. Echocardiogram reveals global hypokinesis and four-chamber dilation. Which
diagnosis best fits her presentation?
A. Hypertrophic cardiomyopathy from pregnancy-related hemodynamic stress
B. Restrictive cardiomyopathy due to peripartum fibrosis
C. Ischemic cardiomyopathy from coronary artery dissection
D. Peripartum cardiomyopathy with idiopathic systolic dysfunction ✓ CORRECT
Correct Answer: D
Rationale: Peripartum cardiomyopathy is a dilated cardiomyopathy that develops in the last
month of pregnancy or within five months postpartum, characterized by idiopathic left
, ventricular systolic dysfunction and four-chamber dilation. Hypertrophic cardiomyopathy is
genetic and presents with diastolic dysfunction and outflow obstruction, not global dilation.
Restrictive cardiomyopathy involves stiff ventricles with preserved systolic function.
Question 5 of 50
A 19-year-old athlete collapses during sprinting. Autopsy reveals asymmetric septal
hypertrophy and myocardial disarray. Which molecular mechanism explains this finding?
A. Mutations in dystrophin causing sarcolemmal instability
B. Sarcomeric protein mutations producing asymmetric hypertrophy and diastolic dysfunction
✓ CORRECT
C. Autoimmune myocarditis with lymphocytic infiltration
D. Amyloid deposition causing ventricular stiffness
Correct Answer: B
Rationale: Hypertrophic cardiomyopathy is an autosomal dominant disorder caused by
mutations in genes encoding sarcomeric proteins such as beta-myosin heavy chain,
producing asymmetric septal hypertrophy, myofibrillar disarray, and dynamic outflow
obstruction. Dystrophin mutations cause dilated cardiomyopathy in Duchenne muscular
dystrophy. Amyloid deposition characterizes restrictive cardiomyopathy with preserved
ventricular size.
Question 6 of 50
A 67-year-old man with chronic heart failure has worsening peripheral edema, hepatomegaly,
and jugular venous distension that increases with inspiration. Which pathophysiologic
process is primarily responsible?
A. Decreased pulmonary capillary wedge pressure
B. Forward failure reducing systemic perfusion
C. Right ventricular dysfunction elevating systemic venous and capillary pressures ✓
CORRECT
D. High-output state increasing venous return
Correct Answer: C
Rationale: Right-sided heart failure impairs right ventricular emptying, causing blood to back
up into the venous system, elevating central venous pressure, and producing hepatomegaly,
ascites, and dependent edema. Left-sided failure primarily increases pulmonary pressures
and causes pulmonary edema. The Kussmaul sign described reflects impaired right
ventricular compliance.
Question 7 of 50
Pathophysiology Official Practice Exam Actual
Exam 2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
══════════════════════════════════════
SECTION 1: CARDIOVASCULAR & HEMATOLOGIC PATHOPHYSIOLOGY Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 62-year-old man with hypertension and hyperlipidemia presents with crushing substernal
chest pain radiating to his left arm. Troponin I is elevated. Which cellular mechanism best
explains the irreversible myocardial damage occurring in this patient?
A. Reversible ischemia causing temporary ATP depletion
B. Coronary vasospasm without underlying plaque rupture
C. Plaque rupture triggering thrombus formation and transmural necrosis ✓ CORRECT
D. Stable angina from fixed coronary stenosis
Correct Answer: C
Rationale: Plaque rupture exposes thrombogenic subendothelial collagen, triggering platelet
aggregation and fibrin clot formation that occludes the coronary artery, causing transmural
myocardial necrosis characteristic of STEMI. Stable angina involves fixed stenosis without
plaque disruption and does not cause irreversible necrosis or elevated troponins. The
distinction between reversible ischemia and infarction hinges on the duration of occlusion
and the presence of biomarker elevation.
Question 2 of 50
A 58-year-old woman with a history of type 2 diabetes presents with dyspnea on exertion,
orthopnea, and bilateral crackles. Her JVP is elevated. Which hemodynamic alteration best
explains her pulmonary symptoms?
A. Left ventricular systolic dysfunction causing increased pulmonary capillary hydrostatic
pressure ✓ CORRECT
B. Right ventricular failure leading to systemic venous congestion
,C. High-output cardiac failure from uncontrolled hyperthyroidism
D. Diastolic dysfunction from restrictive cardiomyopathy
Correct Answer: A
Rationale: Left-sided heart failure produces backward failure, elevating left atrial and
pulmonary capillary pressures, which forces fluid into alveolar spaces and manifests as
pulmonary edema and crackles. Right-sided failure primarily causes systemic venous
congestion such as hepatomegaly and peripheral edema rather than pulmonary symptoms.
The orthopnea and exertional dyspnea reflect the gravitational redistribution of fluid when
supine and increased metabolic demand.
Question 3 of 50
A 45-year-old man with a 20-year history of alcohol use presents with biventricular dilation,
reduced ejection fraction, and S3 gallop. Which pathophysiologic process underlies his
cardiomyopathy?
A. Disseminated myocardial fiber hypertrophy with outflow obstruction
B. Direct toxic myocyte injury and apoptosis leading to ventricular dilation ✓ CORRECT
C. Endomyocardial fibrosis impairing ventricular relaxation
D. Ischemic scarring from coronary atherosclerosis
Correct Answer: B
Rationale: Dilated cardiomyopathy in chronic alcohol abuse results from ethanol and its
metabolite acetaldehyde inducing oxidative stress, mitochondrial dysfunction, and
cardiomyocyte apoptosis, producing four-chamber dilation and systolic failure. Hypertrophic
cardiomyopathy involves sarcomeric mutations causing asymmetric septal thickening and
outflow obstruction, not dilation. Ischemic cardiomyopathy requires significant coronary
disease, which is not described here.
Question 4 of 50
A 28-year-old woman at 32 weeks gestation develops sudden dyspnea, fatigue, and peripheral
edema. Echocardiogram reveals global hypokinesis and four-chamber dilation. Which
diagnosis best fits her presentation?
A. Hypertrophic cardiomyopathy from pregnancy-related hemodynamic stress
B. Restrictive cardiomyopathy due to peripartum fibrosis
C. Ischemic cardiomyopathy from coronary artery dissection
D. Peripartum cardiomyopathy with idiopathic systolic dysfunction ✓ CORRECT
Correct Answer: D
Rationale: Peripartum cardiomyopathy is a dilated cardiomyopathy that develops in the last
month of pregnancy or within five months postpartum, characterized by idiopathic left
, ventricular systolic dysfunction and four-chamber dilation. Hypertrophic cardiomyopathy is
genetic and presents with diastolic dysfunction and outflow obstruction, not global dilation.
Restrictive cardiomyopathy involves stiff ventricles with preserved systolic function.
Question 5 of 50
A 19-year-old athlete collapses during sprinting. Autopsy reveals asymmetric septal
hypertrophy and myocardial disarray. Which molecular mechanism explains this finding?
A. Mutations in dystrophin causing sarcolemmal instability
B. Sarcomeric protein mutations producing asymmetric hypertrophy and diastolic dysfunction
✓ CORRECT
C. Autoimmune myocarditis with lymphocytic infiltration
D. Amyloid deposition causing ventricular stiffness
Correct Answer: B
Rationale: Hypertrophic cardiomyopathy is an autosomal dominant disorder caused by
mutations in genes encoding sarcomeric proteins such as beta-myosin heavy chain,
producing asymmetric septal hypertrophy, myofibrillar disarray, and dynamic outflow
obstruction. Dystrophin mutations cause dilated cardiomyopathy in Duchenne muscular
dystrophy. Amyloid deposition characterizes restrictive cardiomyopathy with preserved
ventricular size.
Question 6 of 50
A 67-year-old man with chronic heart failure has worsening peripheral edema, hepatomegaly,
and jugular venous distension that increases with inspiration. Which pathophysiologic
process is primarily responsible?
A. Decreased pulmonary capillary wedge pressure
B. Forward failure reducing systemic perfusion
C. Right ventricular dysfunction elevating systemic venous and capillary pressures ✓
CORRECT
D. High-output state increasing venous return
Correct Answer: C
Rationale: Right-sided heart failure impairs right ventricular emptying, causing blood to back
up into the venous system, elevating central venous pressure, and producing hepatomegaly,
ascites, and dependent edema. Left-sided failure primarily increases pulmonary pressures
and causes pulmonary edema. The Kussmaul sign described reflects impaired right
ventricular compliance.
Question 7 of 50
