HESI PATHOPHYSIOLOGY FINAL EXAM -ALL QUESTIONS AND
ANSWERS PLUS DETAILED RATIONALES | COMPLETE
STUDYGUIDE| GUARANTEED PASS | DOWNLOAD INSTANT
PDF 2027-2028
1. A client with chronic hypertension develops thickening of the left ventricular wall over
several years. Which pathophysiologic mechanism best explains this finding?
A. Increased preload causing ventricular dilation
B. Chronic pressure overload causing myocardial hypertrophy
C. Reduced systemic vascular resistance causing chamber enlargement
D. Decreased afterload causing myocardial atrophy
Answer: B
Rationale: Chronic hypertension increases left ventricular afterload. The myocardium adapts
to sustained pressure overload by increasing muscle mass, producing left ventricular
hypertrophy.
2. A client with severe dehydration has a heart rate of 118/min and a blood pressure of
88/54 mmHg. Which compensatory response should the nurse expect?
A. Increased sympathetic nervous system activity
B. Decreased release of antidiuretic hormone
C. Increased parasympathetic stimulation
D. Decreased renin secretion
Answer: A
Rationale: Reduced circulating volume activates sympathetic responses, increasing heart rate
and contractility and causing peripheral vasoconstriction to preserve perfusion.
3. A client with left-sided heart failure develops pulmonary crackles and increasing
dyspnea. Which mechanism primarily causes these respiratory manifestations?
A. Decreased pulmonary blood flow
B. Increased oncotic pressure
C. Increased pulmonary capillary hydrostatic pressure
D. Decreased systemic venous pressure
Answer: C
,Rationale: Left ventricular dysfunction causes blood to back up into the pulmonary
circulation, increasing pulmonary capillary hydrostatic pressure and promoting fluid
movement into the interstitial and alveolar spaces.
4. A client develops generalized edema after severe hypoalbuminemia. Which mechanism
best explains the movement of fluid into the interstitial space?
A. Increased plasma oncotic pressure
B. Reduced capillary hydrostatic pressure
C. Increased lymphatic drainage
D. Decreased plasma oncotic pressure
Answer: D
Rationale: Albumin is a major contributor to plasma oncotic pressure. Low albumin reduces
the force retaining fluid within blood vessels, promoting edema formation.
5. A client with a severe bacterial infection develops fever, tachycardia, and warm flushed
skin during the early phase of systemic inflammatory response. Which vascular change
contributes to this presentation?
A. Widespread vasodilation
B. Increased blood viscosity
C. Generalized vasoconstriction
D. Reduced capillary permeability
Answer: A
Rationale: Inflammatory mediators cause vasodilation and increased vascular permeability.
Early distributive shock may therefore present with warm, flushed skin despite inadequate
tissue perfusion.
6. A client experiences an acute blood loss of approximately 1,500 mL after trauma. Which
change occurs first as circulating volume decreases?
A. Increased glomerular filtration
B. Decreased sympathetic activity
C. Activation of compensatory cardiovascular mechanisms
D. Increased urine production
Answer: C
,Rationale: Acute blood loss decreases venous return and cardiac output. Baroreceptor-
mediated sympathetic activation occurs rapidly to maintain blood pressure and perfusion.
7. A client with chronic lung disease has an arterial blood gas showing pH 7.31, PaCO₂ 58
mmHg, and HCO₃⁻ 29 mEq/L. How should the nurse interpret these findings?
A. Uncompensated metabolic alkalosis
B. Respiratory acidosis with partial metabolic compensation
C. Respiratory alkalosis with full compensation
D. Metabolic acidosis with respiratory compensation
Answer: B
Rationale: The low pH and elevated PaCO₂ indicate respiratory acidosis. The elevated
bicarbonate demonstrates renal compensation, but the pH remains abnormal, indicating
partial compensation.
8. A client experiencing prolonged vomiting develops metabolic alkalosis. Which
physiologic change contributes to this acid-base disorder?
A. Excessive bicarbonate loss through stool
B. Increased lactic acid production
C. Retention of carbon dioxide from hypoventilation alone
D. Loss of gastric hydrochloric acid
Answer: D
Rationale: Persistent vomiting removes hydrochloric acid from the stomach, reducing
hydrogen ion concentration and contributing to metabolic alkalosis.
9. A client with severe diarrhea develops metabolic acidosis. Which mechanism best
explains the acid-base disturbance?
A. Excessive loss of bicarbonate-rich intestinal fluid
B. Excessive retention of bicarbonate
C. Increased gastric acid secretion
D. Reduced hydrogen ion production
Answer: A
Rationale: Intestinal fluids contain significant bicarbonate. Prolonged diarrhea can cause
substantial bicarbonate loss, resulting in metabolic acidosis.
, 10. A client with prolonged hypoventilation develops respiratory acidosis. Which renal
response helps compensate for the elevated carbon dioxide level?
A. Increased bicarbonate excretion
B. Reduced hydrogen ion secretion
C. Increased hydrogen ion secretion and bicarbonate retention
D. Decreased ammonium production
Answer: C
Rationale: In respiratory acidosis, the kidneys compensate by increasing hydrogen ion
excretion and retaining or generating bicarbonate, helping buffer the excess acid.
11. A client develops polyuria, intense thirst, and hypernatremia after damage to the
posterior pituitary. Which hormone deficiency most directly explains the condition?
A. Insulin
B. Antidiuretic hormone
C. Aldosterone
D. Cortisol
Answer: B
Rationale: Antidiuretic hormone promotes water reabsorption in the kidneys. Deficiency
causes excessive free-water loss, producing polyuria, dehydration, and hypernatremia.
12. A client with syndrome of inappropriate antidiuretic hormone secretion develops
confusion and a serum sodium level of 118 mEq/L. Which mechanism is responsible?
A. Excessive renal sodium production
B. Increased free-water retention causing dilutional hyponatremia
C. Excessive water loss through the kidneys
D. Increased aldosterone destruction
Answer: B
Rationale: Excess ADH promotes water retention, diluting serum sodium concentration and
potentially causing cerebral edema and neurologic manifestations when hyponatremia is
severe.
ANSWERS PLUS DETAILED RATIONALES | COMPLETE
STUDYGUIDE| GUARANTEED PASS | DOWNLOAD INSTANT
PDF 2027-2028
1. A client with chronic hypertension develops thickening of the left ventricular wall over
several years. Which pathophysiologic mechanism best explains this finding?
A. Increased preload causing ventricular dilation
B. Chronic pressure overload causing myocardial hypertrophy
C. Reduced systemic vascular resistance causing chamber enlargement
D. Decreased afterload causing myocardial atrophy
Answer: B
Rationale: Chronic hypertension increases left ventricular afterload. The myocardium adapts
to sustained pressure overload by increasing muscle mass, producing left ventricular
hypertrophy.
2. A client with severe dehydration has a heart rate of 118/min and a blood pressure of
88/54 mmHg. Which compensatory response should the nurse expect?
A. Increased sympathetic nervous system activity
B. Decreased release of antidiuretic hormone
C. Increased parasympathetic stimulation
D. Decreased renin secretion
Answer: A
Rationale: Reduced circulating volume activates sympathetic responses, increasing heart rate
and contractility and causing peripheral vasoconstriction to preserve perfusion.
3. A client with left-sided heart failure develops pulmonary crackles and increasing
dyspnea. Which mechanism primarily causes these respiratory manifestations?
A. Decreased pulmonary blood flow
B. Increased oncotic pressure
C. Increased pulmonary capillary hydrostatic pressure
D. Decreased systemic venous pressure
Answer: C
,Rationale: Left ventricular dysfunction causes blood to back up into the pulmonary
circulation, increasing pulmonary capillary hydrostatic pressure and promoting fluid
movement into the interstitial and alveolar spaces.
4. A client develops generalized edema after severe hypoalbuminemia. Which mechanism
best explains the movement of fluid into the interstitial space?
A. Increased plasma oncotic pressure
B. Reduced capillary hydrostatic pressure
C. Increased lymphatic drainage
D. Decreased plasma oncotic pressure
Answer: D
Rationale: Albumin is a major contributor to plasma oncotic pressure. Low albumin reduces
the force retaining fluid within blood vessels, promoting edema formation.
5. A client with a severe bacterial infection develops fever, tachycardia, and warm flushed
skin during the early phase of systemic inflammatory response. Which vascular change
contributes to this presentation?
A. Widespread vasodilation
B. Increased blood viscosity
C. Generalized vasoconstriction
D. Reduced capillary permeability
Answer: A
Rationale: Inflammatory mediators cause vasodilation and increased vascular permeability.
Early distributive shock may therefore present with warm, flushed skin despite inadequate
tissue perfusion.
6. A client experiences an acute blood loss of approximately 1,500 mL after trauma. Which
change occurs first as circulating volume decreases?
A. Increased glomerular filtration
B. Decreased sympathetic activity
C. Activation of compensatory cardiovascular mechanisms
D. Increased urine production
Answer: C
,Rationale: Acute blood loss decreases venous return and cardiac output. Baroreceptor-
mediated sympathetic activation occurs rapidly to maintain blood pressure and perfusion.
7. A client with chronic lung disease has an arterial blood gas showing pH 7.31, PaCO₂ 58
mmHg, and HCO₃⁻ 29 mEq/L. How should the nurse interpret these findings?
A. Uncompensated metabolic alkalosis
B. Respiratory acidosis with partial metabolic compensation
C. Respiratory alkalosis with full compensation
D. Metabolic acidosis with respiratory compensation
Answer: B
Rationale: The low pH and elevated PaCO₂ indicate respiratory acidosis. The elevated
bicarbonate demonstrates renal compensation, but the pH remains abnormal, indicating
partial compensation.
8. A client experiencing prolonged vomiting develops metabolic alkalosis. Which
physiologic change contributes to this acid-base disorder?
A. Excessive bicarbonate loss through stool
B. Increased lactic acid production
C. Retention of carbon dioxide from hypoventilation alone
D. Loss of gastric hydrochloric acid
Answer: D
Rationale: Persistent vomiting removes hydrochloric acid from the stomach, reducing
hydrogen ion concentration and contributing to metabolic alkalosis.
9. A client with severe diarrhea develops metabolic acidosis. Which mechanism best
explains the acid-base disturbance?
A. Excessive loss of bicarbonate-rich intestinal fluid
B. Excessive retention of bicarbonate
C. Increased gastric acid secretion
D. Reduced hydrogen ion production
Answer: A
Rationale: Intestinal fluids contain significant bicarbonate. Prolonged diarrhea can cause
substantial bicarbonate loss, resulting in metabolic acidosis.
, 10. A client with prolonged hypoventilation develops respiratory acidosis. Which renal
response helps compensate for the elevated carbon dioxide level?
A. Increased bicarbonate excretion
B. Reduced hydrogen ion secretion
C. Increased hydrogen ion secretion and bicarbonate retention
D. Decreased ammonium production
Answer: C
Rationale: In respiratory acidosis, the kidneys compensate by increasing hydrogen ion
excretion and retaining or generating bicarbonate, helping buffer the excess acid.
11. A client develops polyuria, intense thirst, and hypernatremia after damage to the
posterior pituitary. Which hormone deficiency most directly explains the condition?
A. Insulin
B. Antidiuretic hormone
C. Aldosterone
D. Cortisol
Answer: B
Rationale: Antidiuretic hormone promotes water reabsorption in the kidneys. Deficiency
causes excessive free-water loss, producing polyuria, dehydration, and hypernatremia.
12. A client with syndrome of inappropriate antidiuretic hormone secretion develops
confusion and a serum sodium level of 118 mEq/L. Which mechanism is responsible?
A. Excessive renal sodium production
B. Increased free-water retention causing dilutional hyponatremia
C. Excessive water loss through the kidneys
D. Increased aldosterone destruction
Answer: B
Rationale: Excess ADH promotes water retention, diluting serum sodium concentration and
potentially causing cerebral edema and neurologic manifestations when hyponatremia is
severe.
