NSG 530 EXAM 2/300 ACTUAL QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE
LATEST UPDATE ALREADY GRADED A+
The NSG 530 Exam 2 is a comprehensive graduate-level nursing assessment in
Advanced Pathophysiology, typically administered at Wilkes University. This
rigorous examination evaluates the student's deep understanding of complex
disease processes across multiple body systems, including fluid and electrolyte
imbalances, cancer biology, immune disorders, cardiovascular, respiratory,
renal, gastrointestinal, neurological, and endocrine pathophysiology. The
exam emphasizes the application of pathophysiological concepts to clinical
practice, requiring students to analyze patient presentations, interpret
laboratory findings, and understand disease mechanisms at the cellular and
systems levels. Successful completion demonstrates mastery essential for
advanced practice nursing roles, including nurse practitioners, in providing
evidence-based patient care.
Section 1: Fluid, Electrolyte, and Acid-Base Balance
1. A patient presents with muscle weakness, cardiac arrhythmias, and confusion.
Laboratory results show potassium 6.5 mEq/L and peaked T-waves on ECG. What
is the most likely diagnosis?
A) Hypokalemia
B) Hyperkalemia
C) Hyponatremia
D) Hypernatremia
Answer: B
Rationale: Hyperkalemia is defined as a serum potassium level greater than 5.0
mEq/L. Classic ECG changes include peaked (tented) T-waves, which can
progress to widened QRS and a sine wave pattern. Muscle weakness and cardiac
arrhythmias are also clinical manifestations of hyperkalemia.
,2. Hyponatremia is defined as a serum sodium level of:
A) Less than 130 mEq/L
B) Less than 135 mEq/L
C) Less than 140 mEq/L
D) Less than 145 mEq/L
Answer: B
Rationale: Hyponatremia is defined as a serum sodium level of less than 135
mEq/L. The normal serum sodium range is 135 to 145 mEq/L.
3. Hypokalemia is defined as a serum potassium level of:
A) Less than 3.0 mEq/L
B) Less than 3.5 mEq/L
C) Less than 4.0 mEq/L
D) Less than 5.0 mEq/L
Answer: B
Rationale: Hypokalemia is defined as a serum potassium level of less than 3.5
mEq/L. The normal range for serum potassium is 3.5 to 5.0 mEq/L.
4. An increase in serum osmolality would trigger the release of which hormone?
A) Aldosterone
B) Antidiuretic hormone (ADH)
C) Cortisol
D) Insulin
Answer: B
Rationale: Increased serum osmolality is detected by osmoreceptors in the
hypothalamus, which triggers the release of antidiuretic hormone (ADH) from the
posterior pituitary. ADH acts on the kidneys to increase water reabsorption,
thereby lowering serum osmolality.
5. The anion gap is used to differentiate types of metabolic acidosis. An elevated
anion gap is seen in which condition?
A) Diarrhea
B) Diabetic ketoacidosis
C) Renal tubular acidosis
D) Hyperchloremic acidosis
Answer: B
Rationale: An elevated anion gap metabolic acidosis occurs when there is an
accumulation of unmeasured anions such as ketone bodies in diabetic ketoacidosis
(DKA), lactic acid in lactic acidosis, or toxins.
,6. A patient with diabetic ketoacidosis would have which laboratory findings?
A) pH decreased, HCO3- decreased, anion gap increased
B) pH decreased, HCO3- increased, anion gap normal
C) pH increased, HCO3- decreased, anion gap normal
D) pH increased, HCO3- increased, anion gap decreased
Answer: A
Rationale: Diabetic ketoacidosis causes metabolic acidosis with a decreased pH,
decreased bicarbonate, and an elevated anion gap due to the accumulation of
ketone bodies as unmeasured anions.
7. Respiratory alkalosis is characterized by:
A) Increased pH, increased PaCO2
B) Decreased pH, increased PaCO2
C) Increased pH, decreased PaCO2
D) Decreased pH, decreased PaCO2
Answer: C
Rationale: Respiratory alkalosis results from hyperventilation, which causes a
decrease in PaCO2 and an increase in pH.
8. A patient with renal failure would most likely develop which acid-base
imbalance?
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Answer: A
Rationale: Renal failure causes metabolic acidosis due to the kidneys' inability to
excrete hydrogen ions and reabsorb bicarbonate, leading to an accumulation of
acids.
9. The normal serum sodium range is:
A) 115 to 125 mEq/L
B) 125 to 135 mEq/L
C) 135 to 145 mEq/L
D) 145 to 155 mEq/L
Answer: C
Rationale: The normal serum sodium level is 135 to 145 mEq/L. Sodium is the
primary extracellular cation and plays a critical role in fluid balance and nerve
impulse transmission.
, 10. Which of the following is a cause of respiratory acidosis?
A) Anxiety
B) Chronic obstructive pulmonary disease (COPD)
C) Salicylate toxicity
D) Diabetic ketoacidosis
Answer: B
Rationale: COPD causes respiratory acidosis due to hypoventilation and CO2
retention. Anxiety and salicylate toxicity cause respiratory alkalosis through
hyperventilation.
11. A patient with hyperkalemia would have which ECG change?
A) Peaked T-waves
B) Flattened T-waves and prominent U-waves
C) Prolonged PR interval
D) ST depression
Answer: A
Rationale: Hyperkalemia causes peaked (tented) T-waves on ECG, which can
progress to widened QRS complex and sine wave pattern as potassium levels rise
further.
12. Which of the following is a cause of metabolic acidosis?
A) Prolonged vomiting
B) Diabetic ketoacidosis
C) Hypoventilation
D) Hyperventilation
Answer: B
Rationale: Diabetic ketoacidosis causes metabolic acidosis due to the accumulation
of ketone bodies. Prolonged vomiting causes metabolic alkalosis, hypoventilation
causes respiratory acidosis, and hyperventilation causes respiratory alkalosis.
13. Hypokalemia is associated with which ECG change?
A) Peaked T-waves
B) Flattened T-waves and prominent U-waves
C) Prolonged QRS
D) ST elevation
Answer: B
Rationale: Hypokalemia causes flattened T-waves and the appearance of prominent
U-waves on ECG. This is due to delayed repolarization of the ventricles.
CORRECT ANSWERS WITH RATIONALE
LATEST UPDATE ALREADY GRADED A+
The NSG 530 Exam 2 is a comprehensive graduate-level nursing assessment in
Advanced Pathophysiology, typically administered at Wilkes University. This
rigorous examination evaluates the student's deep understanding of complex
disease processes across multiple body systems, including fluid and electrolyte
imbalances, cancer biology, immune disorders, cardiovascular, respiratory,
renal, gastrointestinal, neurological, and endocrine pathophysiology. The
exam emphasizes the application of pathophysiological concepts to clinical
practice, requiring students to analyze patient presentations, interpret
laboratory findings, and understand disease mechanisms at the cellular and
systems levels. Successful completion demonstrates mastery essential for
advanced practice nursing roles, including nurse practitioners, in providing
evidence-based patient care.
Section 1: Fluid, Electrolyte, and Acid-Base Balance
1. A patient presents with muscle weakness, cardiac arrhythmias, and confusion.
Laboratory results show potassium 6.5 mEq/L and peaked T-waves on ECG. What
is the most likely diagnosis?
A) Hypokalemia
B) Hyperkalemia
C) Hyponatremia
D) Hypernatremia
Answer: B
Rationale: Hyperkalemia is defined as a serum potassium level greater than 5.0
mEq/L. Classic ECG changes include peaked (tented) T-waves, which can
progress to widened QRS and a sine wave pattern. Muscle weakness and cardiac
arrhythmias are also clinical manifestations of hyperkalemia.
,2. Hyponatremia is defined as a serum sodium level of:
A) Less than 130 mEq/L
B) Less than 135 mEq/L
C) Less than 140 mEq/L
D) Less than 145 mEq/L
Answer: B
Rationale: Hyponatremia is defined as a serum sodium level of less than 135
mEq/L. The normal serum sodium range is 135 to 145 mEq/L.
3. Hypokalemia is defined as a serum potassium level of:
A) Less than 3.0 mEq/L
B) Less than 3.5 mEq/L
C) Less than 4.0 mEq/L
D) Less than 5.0 mEq/L
Answer: B
Rationale: Hypokalemia is defined as a serum potassium level of less than 3.5
mEq/L. The normal range for serum potassium is 3.5 to 5.0 mEq/L.
4. An increase in serum osmolality would trigger the release of which hormone?
A) Aldosterone
B) Antidiuretic hormone (ADH)
C) Cortisol
D) Insulin
Answer: B
Rationale: Increased serum osmolality is detected by osmoreceptors in the
hypothalamus, which triggers the release of antidiuretic hormone (ADH) from the
posterior pituitary. ADH acts on the kidneys to increase water reabsorption,
thereby lowering serum osmolality.
5. The anion gap is used to differentiate types of metabolic acidosis. An elevated
anion gap is seen in which condition?
A) Diarrhea
B) Diabetic ketoacidosis
C) Renal tubular acidosis
D) Hyperchloremic acidosis
Answer: B
Rationale: An elevated anion gap metabolic acidosis occurs when there is an
accumulation of unmeasured anions such as ketone bodies in diabetic ketoacidosis
(DKA), lactic acid in lactic acidosis, or toxins.
,6. A patient with diabetic ketoacidosis would have which laboratory findings?
A) pH decreased, HCO3- decreased, anion gap increased
B) pH decreased, HCO3- increased, anion gap normal
C) pH increased, HCO3- decreased, anion gap normal
D) pH increased, HCO3- increased, anion gap decreased
Answer: A
Rationale: Diabetic ketoacidosis causes metabolic acidosis with a decreased pH,
decreased bicarbonate, and an elevated anion gap due to the accumulation of
ketone bodies as unmeasured anions.
7. Respiratory alkalosis is characterized by:
A) Increased pH, increased PaCO2
B) Decreased pH, increased PaCO2
C) Increased pH, decreased PaCO2
D) Decreased pH, decreased PaCO2
Answer: C
Rationale: Respiratory alkalosis results from hyperventilation, which causes a
decrease in PaCO2 and an increase in pH.
8. A patient with renal failure would most likely develop which acid-base
imbalance?
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Answer: A
Rationale: Renal failure causes metabolic acidosis due to the kidneys' inability to
excrete hydrogen ions and reabsorb bicarbonate, leading to an accumulation of
acids.
9. The normal serum sodium range is:
A) 115 to 125 mEq/L
B) 125 to 135 mEq/L
C) 135 to 145 mEq/L
D) 145 to 155 mEq/L
Answer: C
Rationale: The normal serum sodium level is 135 to 145 mEq/L. Sodium is the
primary extracellular cation and plays a critical role in fluid balance and nerve
impulse transmission.
, 10. Which of the following is a cause of respiratory acidosis?
A) Anxiety
B) Chronic obstructive pulmonary disease (COPD)
C) Salicylate toxicity
D) Diabetic ketoacidosis
Answer: B
Rationale: COPD causes respiratory acidosis due to hypoventilation and CO2
retention. Anxiety and salicylate toxicity cause respiratory alkalosis through
hyperventilation.
11. A patient with hyperkalemia would have which ECG change?
A) Peaked T-waves
B) Flattened T-waves and prominent U-waves
C) Prolonged PR interval
D) ST depression
Answer: A
Rationale: Hyperkalemia causes peaked (tented) T-waves on ECG, which can
progress to widened QRS complex and sine wave pattern as potassium levels rise
further.
12. Which of the following is a cause of metabolic acidosis?
A) Prolonged vomiting
B) Diabetic ketoacidosis
C) Hypoventilation
D) Hyperventilation
Answer: B
Rationale: Diabetic ketoacidosis causes metabolic acidosis due to the accumulation
of ketone bodies. Prolonged vomiting causes metabolic alkalosis, hypoventilation
causes respiratory acidosis, and hyperventilation causes respiratory alkalosis.
13. Hypokalemia is associated with which ECG change?
A) Peaked T-waves
B) Flattened T-waves and prominent U-waves
C) Prolonged QRS
D) ST elevation
Answer: B
Rationale: Hypokalemia causes flattened T-waves and the appearance of prominent
U-waves on ECG. This is due to delayed repolarization of the ventricles.
