HESI PATHOPHYSIOLOGY EXAM 2 HU NSG120 FALL C 2026
ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS
2026/2027 WITH RATIONALES GRADED A+
HESI Pathophysiology Exam 2 HU NSG120 Study Guide &
Test Bank | 100+ Actual Exam-Style Questions & Detailed
Rationales (Latest 2026/2027, Verified A+ Grade)
1. A 64-year-old patient with a history of long-standing, poorly controlled
hypertension presents to the clinic. An echocardiogram reveals significant
concentric left ventricular hypertrophy (LVH). Which cellular adaptation
, mechanism is responsible for this structural change, and what is its primary
driving force?
A) Hyperplasia driven by chronic systemic hypotension
B) Hypertrophy driven by increased cardiac afterload
C) Metaplasia driven by localized myocardial ischemia
D) Atrophy driven by decreased metabolic workload
Correct Answer: B) Hypertrophy driven by increased cardiac afterload
Detailed Rationale: Chronic systemic hypertension forces the left ventricle to contract
against a chronically elevated systemic vascular resistance (afterload). Because
myocardial cells are permanent cells and cannot divide (hyperplasia), they adapt to this
increased workload by increasing the synthesis of cellular proteins and myofibrils. This
causes an increase in individual cell size (hypertrophy), thickening the ventricular wall
to sustain cardiac output.
Incorrect Options Breakdown: Hyperplasia involves an increase in cell number, which
does not occur in adult cardiac muscle. Metaplasia is the reversible replacement of one
adult cell type with another, typically seen in epithelial tissues (e.g., Barrett's
esophagus). Atrophy is a reduction in cell size due to disuse or loss of trophic
stimulation.
Q2: Pulmonary Pathophysiology and Ventilation-Perfusion
A 58-year-old post-operative patient suddenly develops acute shortness of breath,
pleuritic chest pain, and tachypnea. A ventilation-perfusion (V/Q) scan is ordered, and
the results indicate a profound V/Q mismatch characterized by normal ventilation but
absent perfusion in the right lower lobe. Which condition is most consistent with these
findings?
A) Acute Respiratory Distress Syndrome (ARDS)
B) Severe Lobar Pneumonia
C) Pulmonary Embolism
D) Chronic Obstructive Pulmonary Disease (COPD)
Correct Answer: C) Pulmonary Embolism
Detailed Rationale: A pulmonary embolism occurs when a thrombus (usually from a
deep vein thrombosis) occludes a pulmonary artery. This completely blocks blood flow
to the downstream alveolar capillary beds, causing absent perfusion. However,
because the airways remain open and unblocked, ventilation is preserved, resulting in
a high V/Q ratio (alveolar dead space).
Incorrect Options Breakdown: ARDS, Pneumonia, and COPD all primarily affect the
lung parenchyma or airways, causing impaired ventilation (fluid or mucus in the alveoli)
while perfusion remains relatively intact, which yields a low V/Q ratio (shunt).
, Q3: Renal and Fluid/Electrolyte Pathophysiology
A patient with an advanced stage of Chronic Kidney Disease (CKD) presents with an
irregular heart rate, profound muscle weakness, and hyperreflexia. An
electrocardiogram (ECG) reveals tall, peaked T waves and a widened QRS complex.
Which electrolyte imbalance is the primary cause of these clinical manifestations?
A) Hypokalemia
B) Hypercalcemia
C) Hyperkalemia
D) Hyponatremia
Correct Answer: C) Hyperkalemia
Detailed Rationale: The kidneys are the primary organ responsible for excreting
potassium from the body. As the glomerular filtration rate (GFR) drops significantly in
advanced CKD, potassium ions accumulate in the extracellular fluid, resulting in
hyperkalemia. Hyperkalemia alters the resting membrane potential of excitable cardiac
and neuromuscular cells. The classic cardiac signature of hyperkalemia includes tall,
peaked T waves, PR interval prolongation, and widening of the QRS complex, which
can quickly progress to ventricular fibrillation.
Incorrect Options Breakdown: Hypokalemia typically causes flattened T waves and
prominent U waves. Hypercalcemia shortens the QT interval. Hyponatremia primarily
manifests with neurological alterations like confusion or seizures due to cerebral edema.
Q4: Gastrointestinal and Hepatic Pathophysiology
A 52-year-old male with a history of severe hepatic cirrhosis presents to the emergency
department with acute cognitive decline, a flapping tremor of the hands (asterixis), and
a musty breath odor (fetor hepaticus). The advanced practice nurse notes a significantly
elevated serum ammonia level. This clinical presentation is indicative of which
neurological complication?
A) Wernicke-Korsakoff Syndrome
B) Hepatic Encephalopathy
C) Acute Ischemic Stroke
D) Delirium Tremens
Correct Answer: B) Hepatic Encephalopathy
, Detailed Rationale: Hepatic encephalopathy is a reversible neuropsychiatric
syndrome caused by severe liver dysfunction or portal-systemic shunting. When the
liver is heavily damaged (as seen in cirrhosis), it fails to convert neurotoxic metabolic
byproducts—specifically ammonia, derived from protein breakdown by intestinal
bacteria—into urea. The excess ammonia crosses the blood-brain barrier, altering
astrocyte function and neurotransmission, which leads to cognitive deficits, confusion,
and the classic flapping tremor known as asterixis.
Incorrect Options Breakdown: Wernicke-Korsakoff Syndrome is caused by a thiamine
(Vitamin B1) deficiency. Delirium Tremens is a severe manifestation of acute alcohol
withdrawal, characterized by tremors, hallucinations, and autonomic instability.
Q5: Neurological Pathophysiology
A 76-year-old female is brought to the emergency department after experiencing a
sudden onset of weakness on the right side of her body and an inability to speak
(aphasia). A non-contrast computed tomography (CT) scan of the head rules out an
intracranial hemorrhage. Based on the pathophysiology of an ischemic stroke, which
cellular event occurs first following the sudden cessation of regional cerebral blood
flow?
A) Mass migration of microglia to initiate phagocytosis
B) Failure of the ATP-dependent sodium-potassium pump
C) Severe intracellular depletion of calcium ions
D) Proliferation of astrocytes to form a glial scar
Correct Answer: B) Failure of the ATP-dependent sodium-potassium pump
Detailed Rationale: Brain tissue is highly metabolic and relies completely on a
continuous supply of oxygen and glucose to generate ATP. Following an ischemic
vascular occlusion, the cessation of blood flow causes an immediate drop in ATP
production. Without ATP, the sodium-potassium pump (Na⁺/K⁺-ATPase) fails,
causing sodium to rush into the cell and potassium to leak out. This rapid intracellular
accumulation of sodium draws water inside via osmosis, resulting in cytotoxic edema
and cellular swelling.
Incorrect Options Breakdown: Intracellular calcium increases drastically (not
depletes) because calcium pumps fail, triggering enzymatic cell death. Microglial
migration and astrocyte scar formation occur much later in the subacute and chronic
stages of stroke healing.
ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS
2026/2027 WITH RATIONALES GRADED A+
HESI Pathophysiology Exam 2 HU NSG120 Study Guide &
Test Bank | 100+ Actual Exam-Style Questions & Detailed
Rationales (Latest 2026/2027, Verified A+ Grade)
1. A 64-year-old patient with a history of long-standing, poorly controlled
hypertension presents to the clinic. An echocardiogram reveals significant
concentric left ventricular hypertrophy (LVH). Which cellular adaptation
, mechanism is responsible for this structural change, and what is its primary
driving force?
A) Hyperplasia driven by chronic systemic hypotension
B) Hypertrophy driven by increased cardiac afterload
C) Metaplasia driven by localized myocardial ischemia
D) Atrophy driven by decreased metabolic workload
Correct Answer: B) Hypertrophy driven by increased cardiac afterload
Detailed Rationale: Chronic systemic hypertension forces the left ventricle to contract
against a chronically elevated systemic vascular resistance (afterload). Because
myocardial cells are permanent cells and cannot divide (hyperplasia), they adapt to this
increased workload by increasing the synthesis of cellular proteins and myofibrils. This
causes an increase in individual cell size (hypertrophy), thickening the ventricular wall
to sustain cardiac output.
Incorrect Options Breakdown: Hyperplasia involves an increase in cell number, which
does not occur in adult cardiac muscle. Metaplasia is the reversible replacement of one
adult cell type with another, typically seen in epithelial tissues (e.g., Barrett's
esophagus). Atrophy is a reduction in cell size due to disuse or loss of trophic
stimulation.
Q2: Pulmonary Pathophysiology and Ventilation-Perfusion
A 58-year-old post-operative patient suddenly develops acute shortness of breath,
pleuritic chest pain, and tachypnea. A ventilation-perfusion (V/Q) scan is ordered, and
the results indicate a profound V/Q mismatch characterized by normal ventilation but
absent perfusion in the right lower lobe. Which condition is most consistent with these
findings?
A) Acute Respiratory Distress Syndrome (ARDS)
B) Severe Lobar Pneumonia
C) Pulmonary Embolism
D) Chronic Obstructive Pulmonary Disease (COPD)
Correct Answer: C) Pulmonary Embolism
Detailed Rationale: A pulmonary embolism occurs when a thrombus (usually from a
deep vein thrombosis) occludes a pulmonary artery. This completely blocks blood flow
to the downstream alveolar capillary beds, causing absent perfusion. However,
because the airways remain open and unblocked, ventilation is preserved, resulting in
a high V/Q ratio (alveolar dead space).
Incorrect Options Breakdown: ARDS, Pneumonia, and COPD all primarily affect the
lung parenchyma or airways, causing impaired ventilation (fluid or mucus in the alveoli)
while perfusion remains relatively intact, which yields a low V/Q ratio (shunt).
, Q3: Renal and Fluid/Electrolyte Pathophysiology
A patient with an advanced stage of Chronic Kidney Disease (CKD) presents with an
irregular heart rate, profound muscle weakness, and hyperreflexia. An
electrocardiogram (ECG) reveals tall, peaked T waves and a widened QRS complex.
Which electrolyte imbalance is the primary cause of these clinical manifestations?
A) Hypokalemia
B) Hypercalcemia
C) Hyperkalemia
D) Hyponatremia
Correct Answer: C) Hyperkalemia
Detailed Rationale: The kidneys are the primary organ responsible for excreting
potassium from the body. As the glomerular filtration rate (GFR) drops significantly in
advanced CKD, potassium ions accumulate in the extracellular fluid, resulting in
hyperkalemia. Hyperkalemia alters the resting membrane potential of excitable cardiac
and neuromuscular cells. The classic cardiac signature of hyperkalemia includes tall,
peaked T waves, PR interval prolongation, and widening of the QRS complex, which
can quickly progress to ventricular fibrillation.
Incorrect Options Breakdown: Hypokalemia typically causes flattened T waves and
prominent U waves. Hypercalcemia shortens the QT interval. Hyponatremia primarily
manifests with neurological alterations like confusion or seizures due to cerebral edema.
Q4: Gastrointestinal and Hepatic Pathophysiology
A 52-year-old male with a history of severe hepatic cirrhosis presents to the emergency
department with acute cognitive decline, a flapping tremor of the hands (asterixis), and
a musty breath odor (fetor hepaticus). The advanced practice nurse notes a significantly
elevated serum ammonia level. This clinical presentation is indicative of which
neurological complication?
A) Wernicke-Korsakoff Syndrome
B) Hepatic Encephalopathy
C) Acute Ischemic Stroke
D) Delirium Tremens
Correct Answer: B) Hepatic Encephalopathy
, Detailed Rationale: Hepatic encephalopathy is a reversible neuropsychiatric
syndrome caused by severe liver dysfunction or portal-systemic shunting. When the
liver is heavily damaged (as seen in cirrhosis), it fails to convert neurotoxic metabolic
byproducts—specifically ammonia, derived from protein breakdown by intestinal
bacteria—into urea. The excess ammonia crosses the blood-brain barrier, altering
astrocyte function and neurotransmission, which leads to cognitive deficits, confusion,
and the classic flapping tremor known as asterixis.
Incorrect Options Breakdown: Wernicke-Korsakoff Syndrome is caused by a thiamine
(Vitamin B1) deficiency. Delirium Tremens is a severe manifestation of acute alcohol
withdrawal, characterized by tremors, hallucinations, and autonomic instability.
Q5: Neurological Pathophysiology
A 76-year-old female is brought to the emergency department after experiencing a
sudden onset of weakness on the right side of her body and an inability to speak
(aphasia). A non-contrast computed tomography (CT) scan of the head rules out an
intracranial hemorrhage. Based on the pathophysiology of an ischemic stroke, which
cellular event occurs first following the sudden cessation of regional cerebral blood
flow?
A) Mass migration of microglia to initiate phagocytosis
B) Failure of the ATP-dependent sodium-potassium pump
C) Severe intracellular depletion of calcium ions
D) Proliferation of astrocytes to form a glial scar
Correct Answer: B) Failure of the ATP-dependent sodium-potassium pump
Detailed Rationale: Brain tissue is highly metabolic and relies completely on a
continuous supply of oxygen and glucose to generate ATP. Following an ischemic
vascular occlusion, the cessation of blood flow causes an immediate drop in ATP
production. Without ATP, the sodium-potassium pump (Na⁺/K⁺-ATPase) fails,
causing sodium to rush into the cell and potassium to leak out. This rapid intracellular
accumulation of sodium draws water inside via osmosis, resulting in cytotoxic edema
and cellular swelling.
Incorrect Options Breakdown: Intracellular calcium increases drastically (not
depletes) because calcium pumps fail, triggering enzymatic cell death. Microglial
migration and astrocyte scar formation occur much later in the subacute and chronic
stages of stroke healing.
