NURSE PRACTITIONER • 3P CORE COMPETENCIES
APEA 3P Exam
Key Concepts and Actual 308 Questions and Answers
2026/2027 A+
Pathophysiology • Pharmacotherapeutics • Physical Assessment
A+ 8 100%
QUESTIONS VERIFIED EXAM DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
1. Cardiovascular
2. Respiratory
3. Gastrointestinal & Hepatobiliary
4. Endocrine & Metabolic
5. Neurological & Psychiatric
6. Musculoskeletal & Rheumatology
7. Genitourinary, Renal & Women's Health
8. Hematology, Infectious Disease, Dermatology & EENT
Aligned to APEA 3P blueprint domains: Physical Assessment • Pathophysiology • Pharmacotherapeutics
across body systems and the age continuum for NP primary care practice.
STUVIAACTUALEXAM
,SECTION 1 — Cardiovascular (Pathophysiology, Pharmacology & Assessment)
Q1. A 58-year-old man with longstanding hypertension develops left ventricular hypertrophy. The primary pathophysiologic mechanism driving this
adaptation is:
A. Decreased afterload leading to chamber dilation only
B. Primary myocardial infection with viral myocarditis
C. Acute volume overload from severe aortic regurgitation alone
D. Chronic pressure overload stimulating myocyte hypertrophy and increased wall thickness
Correct Answer: D
Rationale: Sustained high afterload from hypertension causes concentric hypertrophy as myocytes enlarge to normalize wall stress. This is distinct from
volume-overload eccentric remodeling.
Q2. In atherosclerotic plaque formation, endothelial injury promotes which early sequence?
A. Lipid accumulation, inflammatory cell recruitment, and smooth muscle migration into the intima
B. Immediate calcification without lipid involvement
C. Purely genetic collagen defects without environmental contribution
D. Acute bacterial colonization of the media
Correct Answer: A
Rationale: Response-to-injury models describe endothelial dysfunction, lipid infiltration, monocyte/foam cell formation, and smooth muscle proliferation as central
steps in atherogenesis.
Q3. A patient with acute ST-elevation myocardial infarction develops pulmonary edema within hours. The most likely pathophysiologic link is:
A. Primary right ventricular failure without left-sided involvement
B. Acute left ventricular systolic dysfunction elevating left atrial and pulmonary venous pressure
C. Isolated decreased systemic vascular resistance
D. Acute tricuspid regurgitation as the sole mechanism
Correct Answer: B
Rationale: Ischemic LV dysfunction raises end-diastolic pressure, which is transmitted retrograde to the pulmonary circulation, producing cardiogenic pulmonary
edema.
Q4. The Frank-Starling mechanism describes the relationship in which:
A. Increased afterload always increases stroke volume
B. Heart rate is the only determinant of cardiac output
C. Within physiologic limits, increased preload stretches sarcomeres and augments stroke volume
D. Contractility is independent of sarcomere length
Correct Answer: C
Rationale: Frank-Starling physiology links preload (end-diastolic fiber length) to force of contraction, helping the heart match venous return with output.
Q5. In diastolic heart failure with preserved ejection fraction, the dominant problem is:
A. Severely reduced ejection fraction below 20%
B. Isolated pericardial tamponade physiology
C. Acute chordae rupture
D. Impaired ventricular relaxation and increased stiffness that elevate filling pressures
Correct Answer: D
Rationale: HFpEF features abnormal diastolic filling from stiffness or impaired relaxation; ejection fraction remains relatively preserved while filling pressures rise.
Q6. A 64-year-old with HFrEF (EF 30%), NYHA II, is on an ACE inhibitor and beta blocker. Which additional agent has proven mortality benefit and
is appropriate to consider next in standard GDMT sequencing?
A. A mineralocorticoid receptor antagonist such as spironolactone if potassium and renal function allow
B. A dihydropyridine calcium channel blocker as first add-on for all HFrEF
C. High-dose NSAID therapy for concurrent arthritis
D. Immediate digoxin loading in every stable outpatient
Correct Answer: A
Rationale: MRAs reduce mortality in HFrEF when added to ACEI/ARB/ARNI and beta blockers, provided renal function and potassium are monitored.
Q7. A patient develops a persistent dry cough three weeks after starting lisinopril. The most appropriate management is:
A. Increase the ACE inhibitor dose to overcome tachyphylaxis
B. Discontinue the ACE inhibitor and substitute an ARB if continued renin-angiotensin blockade is desired
C. Add a codeine cough syrup indefinitely while continuing the ACE inhibitor
D. Switch to a nondihydropyridine calcium blocker as the only heart-failure therapy
Correct Answer: B
Rationale: ACE inhibitor cough is mediated by bradykinin accumulation. ARBs do not inhibit kininase II to the same degree and are appropriate alternatives.
Q8. Which statement best describes the primary antihypertensive mechanism of thiazide diuretics with chronic use?
A. Acute only loop-level blockade of the Na-K-2Cl cotransporter
B. Direct alpha-1 receptor antagonism
C. Reduction of blood volume and, with sustained use, decreased peripheral vascular resistance
D. Blockade of L-type calcium channels in vascular smooth muscle exclusively
,Correct Answer: C
Rationale: Thiazides initially reduce volume; long-term BP lowering involves vascular resistance reduction. They act on the distal convoluted tubule Na-Cl
cotransporter.
Q9. A 70-year-old with atrial fibrillation and prior TIA requires anticoagulation. eGFR is 55 mL/min. Which principle guides DOAC selection?
A. All DOACs are contraindicated with any prior TIA
B. Aspirin monotherapy is equivalent to anticoagulation after TIA with AF
C. Warfarin is the only option for secondary stroke prevention
D. Dose and agent selection must account for renal function, age, weight, and drug interactions per labeling
Correct Answer: D
Rationale: DOAC dosing is renally adjusted and product-specific. Correct dosing reduces stroke risk while limiting bleeding in older adults.
Q10. Nitroglycerin relieves anginal chest pain primarily by:
A. Venodilation that reduces preload and myocardial wall tension, lowering oxygen demand
B. Increasing myocardial oxygen demand through reflex tachycardia alone
C. Direct coronary plaque regression within minutes
D. Blocking beta-1 receptors in the myocardium
Correct Answer: A
Rationale: Organic nitrates dilate venous capacitance vessels, reducing preload and wall stress, which decreases myocardial oxygen consumption and can improve
subendocardial perfusion.
Q11. On cardiac auscultation, a holosystolic murmur heard best at the apex and radiating to the left axilla is most consistent with:
A. Aortic stenosis
B. Mitral regurgitation
C. Pulmonic stenosis
D. Aortic regurgitation
Correct Answer: B
Rationale: Mitral regurgitation produces a holosystolic murmur at the apex with axillary radiation. Aortic stenosis is a crescendo-decrescendo systolic murmur at the
right upper sternal border.
Q12. An S3 gallop in an adult patient is most often associated with:
A. Normal finding in all adults over 70
B. Acute pericarditis exclusively
C. Volume overload or ventricular dysfunction with rapid early diastolic filling
D. Severe mitral stenosis only
Correct Answer: C
Rationale: S3 reflects rapid ventricular filling into a dilated or volume-overloaded chamber and is an important sign of heart failure in adults.
Q13. Pulsus paradoxus greater than 10 mm Hg is classically associated with:
A. Isolated essential hypertension
B. Mild mitral valve prolapse
C. Chronic stable angina without structural disease
D. Cardiac tamponade or severe obstructive lung disease physiology
Correct Answer: D
Rationale: Exaggerated inspiratory drop in systolic pressure occurs when right heart filling under respiration compromises left heart output, as in tamponade.
Q14. A harsh crescendo-decrescendo systolic murmur at the right second intercostal space radiating to the carotids suggests:
A. Aortic stenosis
B. Mitral stenosis
C. Tricuspid regurgitation
D. Atrial septal defect fixed splitting only
Correct Answer: A
Rationale: Aortic stenosis is heard at the right upper sternal border with carotid radiation. Radiation and timing help distinguish it from mitral regurgitant murmurs.
Q15. When assessing jugular venous pressure, elevation with prominent v waves is most suggestive of:
A. Hypovolemia
B. Normal findings in athletes
C. Superior vena cava obstruction only
D. Tricuspid regurgitation
Correct Answer: D
Rationale: Tricuspid regurgitation transmits ventricular pressure into the right atrium, producing large v waves in the jugular waveform.
Q16. A 55-year-old’s blood pressure is 168/98 mm Hg on two separate office visits. According to standard staging, this is:
A. Stage 2 hypertension
B. Normal blood pressure
C. Isolated hypotension
D. Orthostatic hypertension exclusively
Correct Answer: A
Rationale: Stage 2 hypertension is defined by SBP ≥140 or DBP ≥90 mm Hg. Confirmation on repeated measurements is required before labeling.
APEA 3P Exam | 2026/2027 | Page 2
, Q17. Ankle-brachial index of 0.75 in a patient with exertional leg pain supports:
A. Normal peripheral arterial supply
B. Peripheral artery disease with hemodynamically significant obstruction
C. Acute deep vein thrombosis as the only diagnosis
D. Purely neuropathic pain without vascular disease
Correct Answer: B
Rationale: ABI ≤0.90 indicates PAD. Values between 0.41 and 0.90 suggest mild to moderate disease correlating with claudication symptoms.
Q18. Bilateral pitting edema to the knees with elevated JVP and clear lung fields is most consistent with:
A. Isolated left-sided heart failure only
B. Acute angioedema from ACE inhibitors
C. Right-sided heart failure or biventricular failure with systemic venous congestion
D. Primary lymphatic filariasis in all cases
Correct Answer: C
Rationale: Systemic venous congestion from right heart failure produces dependent edema and elevated JVP. Left-sided failure more typically causes pulmonary
findings.
Q19. A new diastolic decrescendo murmur at the left sternal border is heard in a patient with wide pulse pressure. The most likely valve lesion is:
A. Mitral stenosis
B. Tricuspid stenosis
C. Pulmonic stenosis
D. Aortic regurgitation
Correct Answer: D
Rationale: Aortic regurgitation produces an early diastolic decrescendo murmur and can widen pulse pressure via elevated stroke volume and low diastolic pressure.
Q20. In evaluating chest pain, which feature most increases likelihood of acute coronary syndrome?
A. Pressure-like pain provoked by exertion and relieved by rest, especially with radiation to the arm or jaw
B. Fleeting sharp pain lasting 2 seconds with local chest wall tenderness only
C. Pain reproduced by palpation of a single costochondral joint
D. Pain only when swallowing cold liquids
Correct Answer: A
Rationale: Exertional pressure-quality pain with classic radiation is higher risk for ischemic disease than fleeting, positional, or purely reproducible musculoskeletal
pain.
Q21. Pathophysiologically, stable angina differs from unstable angina primarily in that:
A. Stable angina always shows complete coronary occlusion on angiography
B. Stable angina is typically demand-related ischemia from fixed stenosis, whereas unstable angina reflects acute plaque changes and thrombosis risk
C. Unstable angina never elevates biomarkers by definition of NSTEMI
D. Stable angina is caused only by coronary vasospasm
Correct Answer: B
Rationale: Stable angina occurs when fixed atherosclerotic stenoses limit flow during increased demand. Unstable syndromes involve plaque rupture/erosion and
thrombus.
Q22. Which pharmacologic class is first-line for rate control in hemodynamically stable atrial fibrillation with rapid ventricular response in a patient
without decompensated heart failure?
A. Beta blockers or nondihydropyridine calcium channel blockers
B. Immediate class Ic antiarrhythmic loading in all outpatients
C. High-dose thiazide diuretics
D. Short-acting nitrates only
Correct Answer: A
Rationale: Beta blockers and nondihydropyridine calcium blockers are standard AV nodal agents for rate control in stable AF, with choice guided by comorbidities.
Q23. A patient on amiodarone requires monitoring primarily because of risk of:
A. Only transient mild headache without organ toxicity
B. Thyroid dysfunction, pulmonary toxicity, hepatic injury, and corneal deposits among other effects
C. Exclusive renal failure without other organ involvement
D. Guaranteed QT shortening
Correct Answer: B
Rationale: Amiodarone’s multi-organ toxicity profile necessitates baseline and periodic monitoring of thyroid, liver, and lung status.
Q24. The primary mechanism of loop diuretics such as furosemide is:
A. Blockade of the epithelial sodium channel in the collecting duct only
B. Osmotic diuresis from filtered mannitol-like effect exclusively
C. Inhibition of the Na-K-2Cl cotransporter in the thick ascending limb
D. Carbonic anhydrase inhibition in the proximal tubule as the main effect
Correct Answer: C
Rationale: Loop diuretics inhibit NKCC2 in the thick ascending limb, producing potent natriuresis and also affecting calcium and magnesium handling.
Q25. In a patient with suspected acute coronary syndrome, the first ECG should be obtained:
A. Within 24 hours if symptoms have resolved
APEA 3P Exam | 2026/2027 | Page 3
APEA 3P Exam
Key Concepts and Actual 308 Questions and Answers
2026/2027 A+
Pathophysiology • Pharmacotherapeutics • Physical Assessment
A+ 8 100%
QUESTIONS VERIFIED EXAM DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
1. Cardiovascular
2. Respiratory
3. Gastrointestinal & Hepatobiliary
4. Endocrine & Metabolic
5. Neurological & Psychiatric
6. Musculoskeletal & Rheumatology
7. Genitourinary, Renal & Women's Health
8. Hematology, Infectious Disease, Dermatology & EENT
Aligned to APEA 3P blueprint domains: Physical Assessment • Pathophysiology • Pharmacotherapeutics
across body systems and the age continuum for NP primary care practice.
STUVIAACTUALEXAM
,SECTION 1 — Cardiovascular (Pathophysiology, Pharmacology & Assessment)
Q1. A 58-year-old man with longstanding hypertension develops left ventricular hypertrophy. The primary pathophysiologic mechanism driving this
adaptation is:
A. Decreased afterload leading to chamber dilation only
B. Primary myocardial infection with viral myocarditis
C. Acute volume overload from severe aortic regurgitation alone
D. Chronic pressure overload stimulating myocyte hypertrophy and increased wall thickness
Correct Answer: D
Rationale: Sustained high afterload from hypertension causes concentric hypertrophy as myocytes enlarge to normalize wall stress. This is distinct from
volume-overload eccentric remodeling.
Q2. In atherosclerotic plaque formation, endothelial injury promotes which early sequence?
A. Lipid accumulation, inflammatory cell recruitment, and smooth muscle migration into the intima
B. Immediate calcification without lipid involvement
C. Purely genetic collagen defects without environmental contribution
D. Acute bacterial colonization of the media
Correct Answer: A
Rationale: Response-to-injury models describe endothelial dysfunction, lipid infiltration, monocyte/foam cell formation, and smooth muscle proliferation as central
steps in atherogenesis.
Q3. A patient with acute ST-elevation myocardial infarction develops pulmonary edema within hours. The most likely pathophysiologic link is:
A. Primary right ventricular failure without left-sided involvement
B. Acute left ventricular systolic dysfunction elevating left atrial and pulmonary venous pressure
C. Isolated decreased systemic vascular resistance
D. Acute tricuspid regurgitation as the sole mechanism
Correct Answer: B
Rationale: Ischemic LV dysfunction raises end-diastolic pressure, which is transmitted retrograde to the pulmonary circulation, producing cardiogenic pulmonary
edema.
Q4. The Frank-Starling mechanism describes the relationship in which:
A. Increased afterload always increases stroke volume
B. Heart rate is the only determinant of cardiac output
C. Within physiologic limits, increased preload stretches sarcomeres and augments stroke volume
D. Contractility is independent of sarcomere length
Correct Answer: C
Rationale: Frank-Starling physiology links preload (end-diastolic fiber length) to force of contraction, helping the heart match venous return with output.
Q5. In diastolic heart failure with preserved ejection fraction, the dominant problem is:
A. Severely reduced ejection fraction below 20%
B. Isolated pericardial tamponade physiology
C. Acute chordae rupture
D. Impaired ventricular relaxation and increased stiffness that elevate filling pressures
Correct Answer: D
Rationale: HFpEF features abnormal diastolic filling from stiffness or impaired relaxation; ejection fraction remains relatively preserved while filling pressures rise.
Q6. A 64-year-old with HFrEF (EF 30%), NYHA II, is on an ACE inhibitor and beta blocker. Which additional agent has proven mortality benefit and
is appropriate to consider next in standard GDMT sequencing?
A. A mineralocorticoid receptor antagonist such as spironolactone if potassium and renal function allow
B. A dihydropyridine calcium channel blocker as first add-on for all HFrEF
C. High-dose NSAID therapy for concurrent arthritis
D. Immediate digoxin loading in every stable outpatient
Correct Answer: A
Rationale: MRAs reduce mortality in HFrEF when added to ACEI/ARB/ARNI and beta blockers, provided renal function and potassium are monitored.
Q7. A patient develops a persistent dry cough three weeks after starting lisinopril. The most appropriate management is:
A. Increase the ACE inhibitor dose to overcome tachyphylaxis
B. Discontinue the ACE inhibitor and substitute an ARB if continued renin-angiotensin blockade is desired
C. Add a codeine cough syrup indefinitely while continuing the ACE inhibitor
D. Switch to a nondihydropyridine calcium blocker as the only heart-failure therapy
Correct Answer: B
Rationale: ACE inhibitor cough is mediated by bradykinin accumulation. ARBs do not inhibit kininase II to the same degree and are appropriate alternatives.
Q8. Which statement best describes the primary antihypertensive mechanism of thiazide diuretics with chronic use?
A. Acute only loop-level blockade of the Na-K-2Cl cotransporter
B. Direct alpha-1 receptor antagonism
C. Reduction of blood volume and, with sustained use, decreased peripheral vascular resistance
D. Blockade of L-type calcium channels in vascular smooth muscle exclusively
,Correct Answer: C
Rationale: Thiazides initially reduce volume; long-term BP lowering involves vascular resistance reduction. They act on the distal convoluted tubule Na-Cl
cotransporter.
Q9. A 70-year-old with atrial fibrillation and prior TIA requires anticoagulation. eGFR is 55 mL/min. Which principle guides DOAC selection?
A. All DOACs are contraindicated with any prior TIA
B. Aspirin monotherapy is equivalent to anticoagulation after TIA with AF
C. Warfarin is the only option for secondary stroke prevention
D. Dose and agent selection must account for renal function, age, weight, and drug interactions per labeling
Correct Answer: D
Rationale: DOAC dosing is renally adjusted and product-specific. Correct dosing reduces stroke risk while limiting bleeding in older adults.
Q10. Nitroglycerin relieves anginal chest pain primarily by:
A. Venodilation that reduces preload and myocardial wall tension, lowering oxygen demand
B. Increasing myocardial oxygen demand through reflex tachycardia alone
C. Direct coronary plaque regression within minutes
D. Blocking beta-1 receptors in the myocardium
Correct Answer: A
Rationale: Organic nitrates dilate venous capacitance vessels, reducing preload and wall stress, which decreases myocardial oxygen consumption and can improve
subendocardial perfusion.
Q11. On cardiac auscultation, a holosystolic murmur heard best at the apex and radiating to the left axilla is most consistent with:
A. Aortic stenosis
B. Mitral regurgitation
C. Pulmonic stenosis
D. Aortic regurgitation
Correct Answer: B
Rationale: Mitral regurgitation produces a holosystolic murmur at the apex with axillary radiation. Aortic stenosis is a crescendo-decrescendo systolic murmur at the
right upper sternal border.
Q12. An S3 gallop in an adult patient is most often associated with:
A. Normal finding in all adults over 70
B. Acute pericarditis exclusively
C. Volume overload or ventricular dysfunction with rapid early diastolic filling
D. Severe mitral stenosis only
Correct Answer: C
Rationale: S3 reflects rapid ventricular filling into a dilated or volume-overloaded chamber and is an important sign of heart failure in adults.
Q13. Pulsus paradoxus greater than 10 mm Hg is classically associated with:
A. Isolated essential hypertension
B. Mild mitral valve prolapse
C. Chronic stable angina without structural disease
D. Cardiac tamponade or severe obstructive lung disease physiology
Correct Answer: D
Rationale: Exaggerated inspiratory drop in systolic pressure occurs when right heart filling under respiration compromises left heart output, as in tamponade.
Q14. A harsh crescendo-decrescendo systolic murmur at the right second intercostal space radiating to the carotids suggests:
A. Aortic stenosis
B. Mitral stenosis
C. Tricuspid regurgitation
D. Atrial septal defect fixed splitting only
Correct Answer: A
Rationale: Aortic stenosis is heard at the right upper sternal border with carotid radiation. Radiation and timing help distinguish it from mitral regurgitant murmurs.
Q15. When assessing jugular venous pressure, elevation with prominent v waves is most suggestive of:
A. Hypovolemia
B. Normal findings in athletes
C. Superior vena cava obstruction only
D. Tricuspid regurgitation
Correct Answer: D
Rationale: Tricuspid regurgitation transmits ventricular pressure into the right atrium, producing large v waves in the jugular waveform.
Q16. A 55-year-old’s blood pressure is 168/98 mm Hg on two separate office visits. According to standard staging, this is:
A. Stage 2 hypertension
B. Normal blood pressure
C. Isolated hypotension
D. Orthostatic hypertension exclusively
Correct Answer: A
Rationale: Stage 2 hypertension is defined by SBP ≥140 or DBP ≥90 mm Hg. Confirmation on repeated measurements is required before labeling.
APEA 3P Exam | 2026/2027 | Page 2
, Q17. Ankle-brachial index of 0.75 in a patient with exertional leg pain supports:
A. Normal peripheral arterial supply
B. Peripheral artery disease with hemodynamically significant obstruction
C. Acute deep vein thrombosis as the only diagnosis
D. Purely neuropathic pain without vascular disease
Correct Answer: B
Rationale: ABI ≤0.90 indicates PAD. Values between 0.41 and 0.90 suggest mild to moderate disease correlating with claudication symptoms.
Q18. Bilateral pitting edema to the knees with elevated JVP and clear lung fields is most consistent with:
A. Isolated left-sided heart failure only
B. Acute angioedema from ACE inhibitors
C. Right-sided heart failure or biventricular failure with systemic venous congestion
D. Primary lymphatic filariasis in all cases
Correct Answer: C
Rationale: Systemic venous congestion from right heart failure produces dependent edema and elevated JVP. Left-sided failure more typically causes pulmonary
findings.
Q19. A new diastolic decrescendo murmur at the left sternal border is heard in a patient with wide pulse pressure. The most likely valve lesion is:
A. Mitral stenosis
B. Tricuspid stenosis
C. Pulmonic stenosis
D. Aortic regurgitation
Correct Answer: D
Rationale: Aortic regurgitation produces an early diastolic decrescendo murmur and can widen pulse pressure via elevated stroke volume and low diastolic pressure.
Q20. In evaluating chest pain, which feature most increases likelihood of acute coronary syndrome?
A. Pressure-like pain provoked by exertion and relieved by rest, especially with radiation to the arm or jaw
B. Fleeting sharp pain lasting 2 seconds with local chest wall tenderness only
C. Pain reproduced by palpation of a single costochondral joint
D. Pain only when swallowing cold liquids
Correct Answer: A
Rationale: Exertional pressure-quality pain with classic radiation is higher risk for ischemic disease than fleeting, positional, or purely reproducible musculoskeletal
pain.
Q21. Pathophysiologically, stable angina differs from unstable angina primarily in that:
A. Stable angina always shows complete coronary occlusion on angiography
B. Stable angina is typically demand-related ischemia from fixed stenosis, whereas unstable angina reflects acute plaque changes and thrombosis risk
C. Unstable angina never elevates biomarkers by definition of NSTEMI
D. Stable angina is caused only by coronary vasospasm
Correct Answer: B
Rationale: Stable angina occurs when fixed atherosclerotic stenoses limit flow during increased demand. Unstable syndromes involve plaque rupture/erosion and
thrombus.
Q22. Which pharmacologic class is first-line for rate control in hemodynamically stable atrial fibrillation with rapid ventricular response in a patient
without decompensated heart failure?
A. Beta blockers or nondihydropyridine calcium channel blockers
B. Immediate class Ic antiarrhythmic loading in all outpatients
C. High-dose thiazide diuretics
D. Short-acting nitrates only
Correct Answer: A
Rationale: Beta blockers and nondihydropyridine calcium blockers are standard AV nodal agents for rate control in stable AF, with choice guided by comorbidities.
Q23. A patient on amiodarone requires monitoring primarily because of risk of:
A. Only transient mild headache without organ toxicity
B. Thyroid dysfunction, pulmonary toxicity, hepatic injury, and corneal deposits among other effects
C. Exclusive renal failure without other organ involvement
D. Guaranteed QT shortening
Correct Answer: B
Rationale: Amiodarone’s multi-organ toxicity profile necessitates baseline and periodic monitoring of thyroid, liver, and lung status.
Q24. The primary mechanism of loop diuretics such as furosemide is:
A. Blockade of the epithelial sodium channel in the collecting duct only
B. Osmotic diuresis from filtered mannitol-like effect exclusively
C. Inhibition of the Na-K-2Cl cotransporter in the thick ascending limb
D. Carbonic anhydrase inhibition in the proximal tubule as the main effect
Correct Answer: C
Rationale: Loop diuretics inhibit NKCC2 in the thick ascending limb, producing potent natriuresis and also affecting calcium and magnesium handling.
Q25. In a patient with suspected acute coronary syndrome, the first ECG should be obtained:
A. Within 24 hours if symptoms have resolved
APEA 3P Exam | 2026/2027 | Page 3
