NSG 555 EXAM (WILKES) EXAM 300 ACTUAL QUESTIONS
AND CORRECT ANSWERS WITH RATIONALE LATEST 2026
ALREADY GRADED A+
This comprehensive 300-question examination bank is specifically designed
for the NSG 555 Exam (Wilkes), covering advanced pathophysiology,
advanced pharmacology, and advanced health assessment at the graduate
nursing level. Each question presents a unique clinical scenario involving
complex disease processes, pharmacologic interventions, diagnostic
interpretation, and evidence-based management. Topics include acid-base
imbalances, hemodynamic monitoring, endocrine disorders, renal failure,
cardiovascular pathophysiology, neurologic emergencies, and advanced
medication mechanisms. Students must analyze laboratory values, interpret
clinical findings, and apply advanced nursing knowledge. No question is
repeated, ensuring thorough preparation for this graduate-level nursing
examination.
1. A patient with chronic kidney disease has a serum creatinine of 6.5 mg/dL and a
glomerular filtration rate of 15 mL/min. Which pathophysiological mechanism is
most responsible for the elevated creatinine level?
A) Increased protein catabolism
B) Decreased renal excretion of creatinine
C) Increased muscle mass
D) Decreased tubular reabsorption
Answer: B
Rationale: Creatinine is a byproduct of muscle metabolism that is freely filtered by
the glomerulus and excreted in urine. In chronic kidney disease, the reduced GFR
leads to decreased excretion of creatinine, causing its accumulation in the blood.
2. A patient with type 2 diabetes mellitus has a hemoglobin A1c of 9.5%. This
value indicates which of the following?
A) Excellent glycemic control
B) Average blood glucose over the past 2 to 3 months of approximately 240 mg/dL
C) Average blood glucose over the past 2 to 3 months of approximately 160 mg/dL
D) A need for immediate insulin therapy
Answer: B
Rationale: Hemoglobin A1c reflects average blood glucose over the previous 8 to
12 weeks. An A1c of 9.5% corresponds to an estimated average glucose of
,approximately 240 mg/dL. This indicates poor glycemic control and increased risk
of complications.
3. A patient with heart failure has a left ventricular ejection fraction of 25%. Which
compensatory mechanism is most likely to be activated in this patient?
A) Decreased sympathetic nervous system activity
B) Increased release of atrial natriuretic peptide
C) Activation of the renin-angiotensin-aldosterone system
D) Decreased systemic vascular resistance
Answer: C
Rationale: In heart failure with reduced ejection fraction, the decreased cardiac
output triggers the renin-angiotensin-aldosterone system (RAAS) to increase blood
volume and systemic vascular resistance. This compensatory mechanism initially
helps maintain perfusion but ultimately worsens heart failure.
4. A patient with liver cirrhosis has ascites and peripheral edema. Which
pathophysiological mechanism is primarily responsible for ascites formation?
A) Increased aldosterone secretion
B) Portal hypertension and hypoalbuminemia
C) Lymphatic obstruction
D) Increased antidiuretic hormone
Answer: B
Rationale: Ascites in cirrhosis is primarily caused by portal hypertension
(increased hydrostatic pressure) and hypoalbuminemia (decreased oncotic
pressure). These forces lead to fluid shifting from the vascular space into the
peritoneal cavity.
5. A patient with chronic obstructive pulmonary disease has a PaCO2 of 58 mmHg
and a pH of 7.32. Which interpretation of this arterial blood gas is correct?
A) Acute respiratory acidosis
B) Partially compensated respiratory acidosis
C) Fully compensated respiratory acidosis
D) Metabolic acidosis with respiratory compensation
Answer: B
Rationale: The pH is low (acidemia), PaCO2 is elevated (respiratory acidosis), and
the bicarbonate is likely elevated (renal compensation). Because the pH remains
abnormal, this is a partially compensated respiratory acidosis.
6. A patient with a history of myocardial infarction is prescribed clopidogrel. The
nurse understands that this medication works by which mechanism?
,A) Inhibiting cyclooxygenase-1
B) Inhibiting the P2Y12 ADP receptor on platelets
C) Inhibiting thrombin formation
D) Enhancing fibrinolysis
Answer: B
Rationale: Clopidogrel is a P2Y12 ADP receptor inhibitor that prevents platelet
aggregation. It does not inhibit COX-1 (aspirin does), nor does it directly affect
thrombin or fibrinolysis.
7. A patient with sepsis has a serum lactate level of 6 mmol/L. This finding
indicates which pathophysiological process?
A) Metabolic alkalosis
B) Tissue hypoxia with anaerobic metabolism
C) Respiratory alkalosis
D) Hepatic dysfunction
Answer: B
Rationale: Elevated lactate in sepsis indicates tissue hypoxia and anaerobic
metabolism due to inadequate oxygen delivery. Lactic acidosis is a marker of
severe sepsis and is associated with increased mortality.
8. A patient with acute kidney injury has a serum potassium of 6.8 mEq/L. Which
electrocardiographic change is most likely to be seen in this patient?
A) U waves
B) Peaked T waves
C) ST segment depression
D) Prolonged PR interval
Answer: B
Rationale: Hyperkalemia causes peaked (tall, tented) T waves on the
electrocardiogram. U waves are seen in hypokalemia, and ST depression and
prolonged PR intervals are seen in other electrolyte imbalances.
9. A patient with Parkinson disease is prescribed levodopa-carbidopa. The
carbidopa component is included to achieve which effect?
A) Increase the bioavailability of levodopa
B) Prevent peripheral conversion of levodopa to dopamine
C) Increase dopamine release from neurons
D) Block dopamine reuptake
Answer: B
, Rationale: Carbidopa is a peripheral decarboxylase inhibitor that prevents the
conversion of levodopa to dopamine in the peripheral circulation. This allows more
levodopa to cross the blood-brain barrier and reduces peripheral side effects.
10. A patient with heart failure is prescribed spironolactone. Which electrolyte
imbalance is most concerning with this medication?
A) Hyperkalemia
B) Hypokalemia
C) Hyponatremia
D) Hypocalcemia
Answer: A
Rationale: Spironolactone is a potassium-sparing diuretic that blocks aldosterone.
It can cause dangerous hyperkalemia, especially in patients with renal impairment
or those taking ACE inhibitors.
11. A patient with diabetic ketoacidosis has a blood glucose of 520 mg/dL and a
serum bicarbonate of 8 mEq/L. Which acid-base disturbance is present?
A) Metabolic acidosis with anion gap
B) Respiratory acidosis
C) Metabolic alkalosis
D) Respiratory alkalosis
Answer: A
Rationale: DKA causes a metabolic acidosis due to the accumulation of ketone
bodies (acetoacetic acid, beta-hydroxybutyric acid). This is an anion gap metabolic
acidosis because the unmeasured anions (ketones) replace bicarbonate.
12. A patient with asthma is using a metered-dose inhaler with a spacer. The nurse
teaches that the spacer is used to achieve which effect?
A) Increase the force of the aerosol
B) Decrease the amount of medication deposited in the oropharynx
C) Increase the speed of inhalation
D) Decrease the bronchodilation effect
Answer: B
Rationale: A spacer holds the aerosolized medication in a chamber, allowing the
patient to inhale it slowly and deeply. This increases lung deposition and decreases
the amount of medication deposited in the oropharynx, reducing local side effects.
13. A patient with chronic kidney disease has a serum phosphorus of 6.5 mg/dL.
Which medication is most appropriate to lower the phosphorus level?
A) Calcium carbonate
AND CORRECT ANSWERS WITH RATIONALE LATEST 2026
ALREADY GRADED A+
This comprehensive 300-question examination bank is specifically designed
for the NSG 555 Exam (Wilkes), covering advanced pathophysiology,
advanced pharmacology, and advanced health assessment at the graduate
nursing level. Each question presents a unique clinical scenario involving
complex disease processes, pharmacologic interventions, diagnostic
interpretation, and evidence-based management. Topics include acid-base
imbalances, hemodynamic monitoring, endocrine disorders, renal failure,
cardiovascular pathophysiology, neurologic emergencies, and advanced
medication mechanisms. Students must analyze laboratory values, interpret
clinical findings, and apply advanced nursing knowledge. No question is
repeated, ensuring thorough preparation for this graduate-level nursing
examination.
1. A patient with chronic kidney disease has a serum creatinine of 6.5 mg/dL and a
glomerular filtration rate of 15 mL/min. Which pathophysiological mechanism is
most responsible for the elevated creatinine level?
A) Increased protein catabolism
B) Decreased renal excretion of creatinine
C) Increased muscle mass
D) Decreased tubular reabsorption
Answer: B
Rationale: Creatinine is a byproduct of muscle metabolism that is freely filtered by
the glomerulus and excreted in urine. In chronic kidney disease, the reduced GFR
leads to decreased excretion of creatinine, causing its accumulation in the blood.
2. A patient with type 2 diabetes mellitus has a hemoglobin A1c of 9.5%. This
value indicates which of the following?
A) Excellent glycemic control
B) Average blood glucose over the past 2 to 3 months of approximately 240 mg/dL
C) Average blood glucose over the past 2 to 3 months of approximately 160 mg/dL
D) A need for immediate insulin therapy
Answer: B
Rationale: Hemoglobin A1c reflects average blood glucose over the previous 8 to
12 weeks. An A1c of 9.5% corresponds to an estimated average glucose of
,approximately 240 mg/dL. This indicates poor glycemic control and increased risk
of complications.
3. A patient with heart failure has a left ventricular ejection fraction of 25%. Which
compensatory mechanism is most likely to be activated in this patient?
A) Decreased sympathetic nervous system activity
B) Increased release of atrial natriuretic peptide
C) Activation of the renin-angiotensin-aldosterone system
D) Decreased systemic vascular resistance
Answer: C
Rationale: In heart failure with reduced ejection fraction, the decreased cardiac
output triggers the renin-angiotensin-aldosterone system (RAAS) to increase blood
volume and systemic vascular resistance. This compensatory mechanism initially
helps maintain perfusion but ultimately worsens heart failure.
4. A patient with liver cirrhosis has ascites and peripheral edema. Which
pathophysiological mechanism is primarily responsible for ascites formation?
A) Increased aldosterone secretion
B) Portal hypertension and hypoalbuminemia
C) Lymphatic obstruction
D) Increased antidiuretic hormone
Answer: B
Rationale: Ascites in cirrhosis is primarily caused by portal hypertension
(increased hydrostatic pressure) and hypoalbuminemia (decreased oncotic
pressure). These forces lead to fluid shifting from the vascular space into the
peritoneal cavity.
5. A patient with chronic obstructive pulmonary disease has a PaCO2 of 58 mmHg
and a pH of 7.32. Which interpretation of this arterial blood gas is correct?
A) Acute respiratory acidosis
B) Partially compensated respiratory acidosis
C) Fully compensated respiratory acidosis
D) Metabolic acidosis with respiratory compensation
Answer: B
Rationale: The pH is low (acidemia), PaCO2 is elevated (respiratory acidosis), and
the bicarbonate is likely elevated (renal compensation). Because the pH remains
abnormal, this is a partially compensated respiratory acidosis.
6. A patient with a history of myocardial infarction is prescribed clopidogrel. The
nurse understands that this medication works by which mechanism?
,A) Inhibiting cyclooxygenase-1
B) Inhibiting the P2Y12 ADP receptor on platelets
C) Inhibiting thrombin formation
D) Enhancing fibrinolysis
Answer: B
Rationale: Clopidogrel is a P2Y12 ADP receptor inhibitor that prevents platelet
aggregation. It does not inhibit COX-1 (aspirin does), nor does it directly affect
thrombin or fibrinolysis.
7. A patient with sepsis has a serum lactate level of 6 mmol/L. This finding
indicates which pathophysiological process?
A) Metabolic alkalosis
B) Tissue hypoxia with anaerobic metabolism
C) Respiratory alkalosis
D) Hepatic dysfunction
Answer: B
Rationale: Elevated lactate in sepsis indicates tissue hypoxia and anaerobic
metabolism due to inadequate oxygen delivery. Lactic acidosis is a marker of
severe sepsis and is associated with increased mortality.
8. A patient with acute kidney injury has a serum potassium of 6.8 mEq/L. Which
electrocardiographic change is most likely to be seen in this patient?
A) U waves
B) Peaked T waves
C) ST segment depression
D) Prolonged PR interval
Answer: B
Rationale: Hyperkalemia causes peaked (tall, tented) T waves on the
electrocardiogram. U waves are seen in hypokalemia, and ST depression and
prolonged PR intervals are seen in other electrolyte imbalances.
9. A patient with Parkinson disease is prescribed levodopa-carbidopa. The
carbidopa component is included to achieve which effect?
A) Increase the bioavailability of levodopa
B) Prevent peripheral conversion of levodopa to dopamine
C) Increase dopamine release from neurons
D) Block dopamine reuptake
Answer: B
, Rationale: Carbidopa is a peripheral decarboxylase inhibitor that prevents the
conversion of levodopa to dopamine in the peripheral circulation. This allows more
levodopa to cross the blood-brain barrier and reduces peripheral side effects.
10. A patient with heart failure is prescribed spironolactone. Which electrolyte
imbalance is most concerning with this medication?
A) Hyperkalemia
B) Hypokalemia
C) Hyponatremia
D) Hypocalcemia
Answer: A
Rationale: Spironolactone is a potassium-sparing diuretic that blocks aldosterone.
It can cause dangerous hyperkalemia, especially in patients with renal impairment
or those taking ACE inhibitors.
11. A patient with diabetic ketoacidosis has a blood glucose of 520 mg/dL and a
serum bicarbonate of 8 mEq/L. Which acid-base disturbance is present?
A) Metabolic acidosis with anion gap
B) Respiratory acidosis
C) Metabolic alkalosis
D) Respiratory alkalosis
Answer: A
Rationale: DKA causes a metabolic acidosis due to the accumulation of ketone
bodies (acetoacetic acid, beta-hydroxybutyric acid). This is an anion gap metabolic
acidosis because the unmeasured anions (ketones) replace bicarbonate.
12. A patient with asthma is using a metered-dose inhaler with a spacer. The nurse
teaches that the spacer is used to achieve which effect?
A) Increase the force of the aerosol
B) Decrease the amount of medication deposited in the oropharynx
C) Increase the speed of inhalation
D) Decrease the bronchodilation effect
Answer: B
Rationale: A spacer holds the aerosolized medication in a chamber, allowing the
patient to inhale it slowly and deeply. This increases lung deposition and decreases
the amount of medication deposited in the oropharynx, reducing local side effects.
13. A patient with chronic kidney disease has a serum phosphorus of 6.5 mg/dL.
Which medication is most appropriate to lower the phosphorus level?
A) Calcium carbonate
