APEA 3P Exam Test Bank: Comprehensive
Practice Questions for Advanced
Pathophysiology, Pharmacology, and
Physical Assessment
QUESTION 1
A 68-year-old male with a history of hypertension presents with
fatigue, dyspnea on exertion, and bilateral lower extremity edema.
On cardiac auscultation, an S3 gallop is heard at the apex. Which of
the following pathophysiological mechanisms best explains the
presence of an S3 heart sound?
A. Increased stiffness of the left ventricular wall during diastole
B. Turbulent blood flow across a stenotic aortic valve
C. Rapid deceleration of blood against a noncompliant left ventricle
during early diastole
D. Closure of the atrioventricular valves at the beginning of systole
Correct Answer: C
Rationale: An S3 heart sound occurs during early diastole when
blood rapidly fills the ventricles, causing vibration of the ventricular
walls. In a volume-overloaded or failing ventricle, the rapid
deceleration of blood against a noncompliant chamber produces
this low-frequency sound. S3 is often associated with heart failure,
volume overload, or reduced ventricular compliance. Option A
,describes the pathophysiology of an S4 sound (atrial gallop), option
B describes an ejection murmur, and option D describes S1.
QUESTION 2
A 45-year-old female presents with progressive weakness, fatigue,
and weight loss. Laboratory findings reveal hyponatremia,
hyperkalemia, and metabolic acidosis. Which of the following
endocrine disorders is most consistent with these findings?
A. Cushing's syndrome
B. Primary hyperaldosteronism
C. Adrenal insufficiency (Addison's disease)
D. Pheochromocytoma
Correct Answer: C
Rationale: Adrenal insufficiency (Addison's disease) is characterized
by deficiency of both cortisol and aldosterone. Aldosterone
deficiency leads to renal sodium wasting (hyponatremia), potassium
retention (hyperkalemia), and metabolic acidosis due to impaired
hydrogen ion excretion. Cushing's syndrome presents with
hypercortisolism and typically causes hypernatremia and
hypokalemia. Primary hyperaldosteronism causes hypertension,
hypokalemia, and metabolic alkalosis. Pheochromocytoma presents
with episodic hypertension, tachycardia, and diaphoresis.
,QUESTION 3
A 72-year-old male presents with a history of chronic obstructive
pulmonary disease (COPD). Arterial blood gas analysis reveals pH
7.32, PaCO₂ 58 mmHg, HCO₃⁻ 30 mEq/L. Which of the following
best describes this acid-base disturbance?
A. Acute respiratory acidosis with no metabolic compensation
B. Chronic respiratory acidosis with metabolic compensation
C. Acute respiratory alkalosis with metabolic compensation
D. Metabolic acidosis with respiratory compensation
Correct Answer: B
Rationale: The ABG shows acidemia (pH 7.32) with elevated PaCO₂
(58 mmHg), indicating respiratory acidosis. The elevated HCO₃⁻ (30
mEq/L) represents metabolic compensation, which occurs over 3-5
days in chronic respiratory acidosis. In acute respiratory acidosis,
HCO₃⁻ would be near normal (increasing only 1 mEq/L per 10
mmHg rise in PaCO₂). This patient's COPD history suggests a
chronic process with renal compensation.
QUESTION 4
A 55-year-old male with a 30-pack-year smoking history presents
with hemoptysis, weight loss, and persistent cough. Chest CT
reveals a 3-cm mass in the right upper lobe with mediastinal
lymphadenopathy. Which of the following paraneoplastic
, syndromes is most commonly associated with small cell lung
cancer?
A. Hypercalcemia
B. Syndrome of inappropriate antidiuretic hormone (SIADH)
C. Hypertrophic pulmonary osteoarthropathy
D. Acanthosis nigricans
Correct Answer: B
Rationale: Small cell lung cancer (SCLC) is strongly associated with
paraneoplastic syndromes, particularly SIADH due to ectopic ADH
production. SIADH results in hyponatremia, concentrated urine, and
euvolemia. Hypercalcemia is more commonly associated with
squamous cell carcinoma. Hypertrophic pulmonary
osteoarthropathy is associated with non-small cell lung cancer.
Acanthosis nigricans is associated with gastric and other
gastrointestinal malignancies.
QUESTION 5
A 32-year-old woman presents with episodic headaches,
palpitations, and diaphoresis accompanied by severe hypertension.
Laboratory testing reveals elevated plasma metanephrines. Which
of the following is the most appropriate next step in management?
A. Initiate beta-blocker therapy immediately
B. Obtain CT scan of the abdomen
C. Administer intravenous phentolamine
D. Obtain 24-hour urine collection for catecholamines
Practice Questions for Advanced
Pathophysiology, Pharmacology, and
Physical Assessment
QUESTION 1
A 68-year-old male with a history of hypertension presents with
fatigue, dyspnea on exertion, and bilateral lower extremity edema.
On cardiac auscultation, an S3 gallop is heard at the apex. Which of
the following pathophysiological mechanisms best explains the
presence of an S3 heart sound?
A. Increased stiffness of the left ventricular wall during diastole
B. Turbulent blood flow across a stenotic aortic valve
C. Rapid deceleration of blood against a noncompliant left ventricle
during early diastole
D. Closure of the atrioventricular valves at the beginning of systole
Correct Answer: C
Rationale: An S3 heart sound occurs during early diastole when
blood rapidly fills the ventricles, causing vibration of the ventricular
walls. In a volume-overloaded or failing ventricle, the rapid
deceleration of blood against a noncompliant chamber produces
this low-frequency sound. S3 is often associated with heart failure,
volume overload, or reduced ventricular compliance. Option A
,describes the pathophysiology of an S4 sound (atrial gallop), option
B describes an ejection murmur, and option D describes S1.
QUESTION 2
A 45-year-old female presents with progressive weakness, fatigue,
and weight loss. Laboratory findings reveal hyponatremia,
hyperkalemia, and metabolic acidosis. Which of the following
endocrine disorders is most consistent with these findings?
A. Cushing's syndrome
B. Primary hyperaldosteronism
C. Adrenal insufficiency (Addison's disease)
D. Pheochromocytoma
Correct Answer: C
Rationale: Adrenal insufficiency (Addison's disease) is characterized
by deficiency of both cortisol and aldosterone. Aldosterone
deficiency leads to renal sodium wasting (hyponatremia), potassium
retention (hyperkalemia), and metabolic acidosis due to impaired
hydrogen ion excretion. Cushing's syndrome presents with
hypercortisolism and typically causes hypernatremia and
hypokalemia. Primary hyperaldosteronism causes hypertension,
hypokalemia, and metabolic alkalosis. Pheochromocytoma presents
with episodic hypertension, tachycardia, and diaphoresis.
,QUESTION 3
A 72-year-old male presents with a history of chronic obstructive
pulmonary disease (COPD). Arterial blood gas analysis reveals pH
7.32, PaCO₂ 58 mmHg, HCO₃⁻ 30 mEq/L. Which of the following
best describes this acid-base disturbance?
A. Acute respiratory acidosis with no metabolic compensation
B. Chronic respiratory acidosis with metabolic compensation
C. Acute respiratory alkalosis with metabolic compensation
D. Metabolic acidosis with respiratory compensation
Correct Answer: B
Rationale: The ABG shows acidemia (pH 7.32) with elevated PaCO₂
(58 mmHg), indicating respiratory acidosis. The elevated HCO₃⁻ (30
mEq/L) represents metabolic compensation, which occurs over 3-5
days in chronic respiratory acidosis. In acute respiratory acidosis,
HCO₃⁻ would be near normal (increasing only 1 mEq/L per 10
mmHg rise in PaCO₂). This patient's COPD history suggests a
chronic process with renal compensation.
QUESTION 4
A 55-year-old male with a 30-pack-year smoking history presents
with hemoptysis, weight loss, and persistent cough. Chest CT
reveals a 3-cm mass in the right upper lobe with mediastinal
lymphadenopathy. Which of the following paraneoplastic
, syndromes is most commonly associated with small cell lung
cancer?
A. Hypercalcemia
B. Syndrome of inappropriate antidiuretic hormone (SIADH)
C. Hypertrophic pulmonary osteoarthropathy
D. Acanthosis nigricans
Correct Answer: B
Rationale: Small cell lung cancer (SCLC) is strongly associated with
paraneoplastic syndromes, particularly SIADH due to ectopic ADH
production. SIADH results in hyponatremia, concentrated urine, and
euvolemia. Hypercalcemia is more commonly associated with
squamous cell carcinoma. Hypertrophic pulmonary
osteoarthropathy is associated with non-small cell lung cancer.
Acanthosis nigricans is associated with gastric and other
gastrointestinal malignancies.
QUESTION 5
A 32-year-old woman presents with episodic headaches,
palpitations, and diaphoresis accompanied by severe hypertension.
Laboratory testing reveals elevated plasma metanephrines. Which
of the following is the most appropriate next step in management?
A. Initiate beta-blocker therapy immediately
B. Obtain CT scan of the abdomen
C. Administer intravenous phentolamine
D. Obtain 24-hour urine collection for catecholamines
