HESI Pathophysiology Examination
Practice Questions 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
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Question 1. A 55-year-old male with a history of uncontrolled hypertension
presents to the clinic. An echocardiogram reveals concentric left ventricular
hypertrophy. Which cellular adaptation best describes this finding?
A. Hyperplasia of cardiac muscle cells
B. Hypertrophy of cardiac muscle cells
C. Metaplasia of cardiac muscle cells
D. Dysplasia of cardiac muscle cells
Cardiac myocytes are permanent cells that cannot undergo mitosis to divide
and increase in number (hyperplasia). To adapt to chronic hemodynamic
overload from hypertension, they increase in size, which is hypertrophy.
Question 2. A patient with severe COPD presents with an arterial blood gas
showing pH 7.31, PaCO2 52 mmHg, and HCO3- 28 mEq/L. What is the correct
interpretation?
A. Uncompensated respiratory acidosis
B. Partially compensated respiratory acidosis
C. Fully compensated respiratory acidosis
D. Metabolic acidosis with respiratory compensation
The pH below 7.35 indicates acidosis. The elevated PaCO2 shows a respiratory
origin. The elevated HCO3- indicates the kidneys are actively retaining
,bicarbonate to compensate, making this a partially compensated respiratory
acidosis.
Question 3. During inflammation, which sequence correctly describes the
vascular response?
A. Vasoconstriction → increased permeability → chemotaxis
B. Vasodilation → increased permeability → margination
C. Margination → vasodilation → phagocytosis
D. Increased permeability → vasoconstriction → emigration
The correct sequence of vascular events in acute inflammation begins with
vasodilation, followed by increased vascular permeability, which allows
leukocytes to marginate (adhere to the endothelium) and then emigrate into
the tissues.
Question 4. A patient with liver cirrhosis develops ascites and generalized
edema (anasarca). Which laboratory finding would best explain these fluid
shifts?
A. Elevated serum albumin
B. Decreased serum albumin
C. Elevated BUN and creatinine
D. Decreased antidiuretic hormone (ADH)
The liver synthesizes albumin. In cirrhosis, albumin production drops, leading
to decreased plasma oncotic pressure. This causes fluid to leak from the
intravascular space into the interstitial space, resulting in edema and ascites.
Question 5. A patient sustains a traumatic injury to the hypothalamus. Which
hormonal imbalance is most likely to occur?
A. Excess cortisol due to ACTH hypersecretion
B. Diabetes insipidus due to ADH deficiency
C. Hyperthyroidism due to TRH excess
D. Primary hyperaldosteronism
,The hypothalamus produces antidiuretic hormone (ADH), which is stored in
the posterior pituitary. Hypothalamic damage can cause central diabetes
insipidus due to a lack of ADH, leading to polyuria, polydipsia, and
hypernatremia.
Question 6. A patient with septic shock has a high cardiac output but low
systemic vascular resistance. This hemodynamic profile is primarily due to:
A. Massive vasodilation from inflammatory mediators
B. Depressed myocardial contractility
C. Hypovolemia from capillary leak
D. Increased afterload
In septic shock, cytokines such as TNF and IL-1, along with nitric oxide, cause
profound vasodilation, leading to decreased systemic vascular resistance.
Cardiac output is initially normal or high as the heart compensates.
Question 7. In a patient with chronic renal failure, which electrolyte imbalance
is most immediately life-threatening?
A. Hyponatremia
B. Hyperkalemia
C. Hypocalcemia
D. Hypermagnesemia
The kidneys excrete approximately 90% of daily potassium. In renal failure,
potassium accumulates, leading to hyperkalemia, which poses a significant
risk of fatal cardiac arrhythmias and asystole.
Question 8. A patient with sickle cell anemia presents with severe pain in the
hands and feet. What is the underlying pathophysiology of this pain?
A. Vaso-occlusion from sickled cells causing ischemia
B. Iron deficiency leading to impaired oxygen transport
C. Autoimmune destruction of red blood cells
D. Bone marrow hyperplasia causing periosteal stretching
, In sickle cell anemia, deformed hemoglobin (HbS) polymerizes under
deoxygenated conditions, causing red blood cells to assume a crescent shape.
These sickled cells are rigid and adhere to vessel walls, obstructing blood flow
and causing vaso-occlusion, tissue ischemia, and severe pain.
Question 9. A client with Barrett's esophagus undergoes an endoscopic biopsy.
The pathology report indicates a change from normal squamous epithelium to
columnar epithelium. This finding is most consistent with which cellular
adaptation?
A. Dysplasia
B. Anaplasia
C. Metaplasia
D. Hyperplasia
Metaplasia is the reversible replacement of one mature cell type with
another mature cell type. In Barrett's esophagus, chronic exposure to
stomach acid causes squamous cells to be replaced by columnar cells, which
are more resistant to acid injury.
Question 10. A client's arm was immobilized in a cast for eight weeks. After
cast removal, the muscles appear visibly smaller. This finding is best explained
by which pathophysiologic process?
A. Necrosis
B. Apoptosis
C. Dysplasia
D. Atrophy
Atrophy is a decrease in cell size resulting from reduced workload or disuse.
Immobilization leads to decreased muscle use, causing protein degradation
via the ubiquitin-proteasome system and subsequent reduction in muscle
mass.
Question 11. A client is prescribed a medication that inhibits the sodium-
potassium pump (Na+/K+-ATPase). What is the most direct consequence of this
inhibition?
Practice Questions 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
Question 1. A 55-year-old male with a history of uncontrolled hypertension
presents to the clinic. An echocardiogram reveals concentric left ventricular
hypertrophy. Which cellular adaptation best describes this finding?
A. Hyperplasia of cardiac muscle cells
B. Hypertrophy of cardiac muscle cells
C. Metaplasia of cardiac muscle cells
D. Dysplasia of cardiac muscle cells
Cardiac myocytes are permanent cells that cannot undergo mitosis to divide
and increase in number (hyperplasia). To adapt to chronic hemodynamic
overload from hypertension, they increase in size, which is hypertrophy.
Question 2. A patient with severe COPD presents with an arterial blood gas
showing pH 7.31, PaCO2 52 mmHg, and HCO3- 28 mEq/L. What is the correct
interpretation?
A. Uncompensated respiratory acidosis
B. Partially compensated respiratory acidosis
C. Fully compensated respiratory acidosis
D. Metabolic acidosis with respiratory compensation
The pH below 7.35 indicates acidosis. The elevated PaCO2 shows a respiratory
origin. The elevated HCO3- indicates the kidneys are actively retaining
,bicarbonate to compensate, making this a partially compensated respiratory
acidosis.
Question 3. During inflammation, which sequence correctly describes the
vascular response?
A. Vasoconstriction → increased permeability → chemotaxis
B. Vasodilation → increased permeability → margination
C. Margination → vasodilation → phagocytosis
D. Increased permeability → vasoconstriction → emigration
The correct sequence of vascular events in acute inflammation begins with
vasodilation, followed by increased vascular permeability, which allows
leukocytes to marginate (adhere to the endothelium) and then emigrate into
the tissues.
Question 4. A patient with liver cirrhosis develops ascites and generalized
edema (anasarca). Which laboratory finding would best explain these fluid
shifts?
A. Elevated serum albumin
B. Decreased serum albumin
C. Elevated BUN and creatinine
D. Decreased antidiuretic hormone (ADH)
The liver synthesizes albumin. In cirrhosis, albumin production drops, leading
to decreased plasma oncotic pressure. This causes fluid to leak from the
intravascular space into the interstitial space, resulting in edema and ascites.
Question 5. A patient sustains a traumatic injury to the hypothalamus. Which
hormonal imbalance is most likely to occur?
A. Excess cortisol due to ACTH hypersecretion
B. Diabetes insipidus due to ADH deficiency
C. Hyperthyroidism due to TRH excess
D. Primary hyperaldosteronism
,The hypothalamus produces antidiuretic hormone (ADH), which is stored in
the posterior pituitary. Hypothalamic damage can cause central diabetes
insipidus due to a lack of ADH, leading to polyuria, polydipsia, and
hypernatremia.
Question 6. A patient with septic shock has a high cardiac output but low
systemic vascular resistance. This hemodynamic profile is primarily due to:
A. Massive vasodilation from inflammatory mediators
B. Depressed myocardial contractility
C. Hypovolemia from capillary leak
D. Increased afterload
In septic shock, cytokines such as TNF and IL-1, along with nitric oxide, cause
profound vasodilation, leading to decreased systemic vascular resistance.
Cardiac output is initially normal or high as the heart compensates.
Question 7. In a patient with chronic renal failure, which electrolyte imbalance
is most immediately life-threatening?
A. Hyponatremia
B. Hyperkalemia
C. Hypocalcemia
D. Hypermagnesemia
The kidneys excrete approximately 90% of daily potassium. In renal failure,
potassium accumulates, leading to hyperkalemia, which poses a significant
risk of fatal cardiac arrhythmias and asystole.
Question 8. A patient with sickle cell anemia presents with severe pain in the
hands and feet. What is the underlying pathophysiology of this pain?
A. Vaso-occlusion from sickled cells causing ischemia
B. Iron deficiency leading to impaired oxygen transport
C. Autoimmune destruction of red blood cells
D. Bone marrow hyperplasia causing periosteal stretching
, In sickle cell anemia, deformed hemoglobin (HbS) polymerizes under
deoxygenated conditions, causing red blood cells to assume a crescent shape.
These sickled cells are rigid and adhere to vessel walls, obstructing blood flow
and causing vaso-occlusion, tissue ischemia, and severe pain.
Question 9. A client with Barrett's esophagus undergoes an endoscopic biopsy.
The pathology report indicates a change from normal squamous epithelium to
columnar epithelium. This finding is most consistent with which cellular
adaptation?
A. Dysplasia
B. Anaplasia
C. Metaplasia
D. Hyperplasia
Metaplasia is the reversible replacement of one mature cell type with
another mature cell type. In Barrett's esophagus, chronic exposure to
stomach acid causes squamous cells to be replaced by columnar cells, which
are more resistant to acid injury.
Question 10. A client's arm was immobilized in a cast for eight weeks. After
cast removal, the muscles appear visibly smaller. This finding is best explained
by which pathophysiologic process?
A. Necrosis
B. Apoptosis
C. Dysplasia
D. Atrophy
Atrophy is a decrease in cell size resulting from reduced workload or disuse.
Immobilization leads to decreased muscle use, causing protein degradation
via the ubiquitin-proteasome system and subsequent reduction in muscle
mass.
Question 11. A client is prescribed a medication that inhibits the sodium-
potassium pump (Na+/K+-ATPase). What is the most direct consequence of this
inhibition?
