📝 Step 5 — KMU Past Papers & Exam Learning
This section contains KMU-style past paper questions designed to strengthen conceptual understanding. Focus on understanding explanations rather than memorizing answers.
🎯 How to Study KMU Past Papers
- Read the question carefully.
- Think about the answer before looking.
- Read the explanation slowly.
- Understand the reasoning behind the correct answer.
- Revise difficult questions again.
MCQ 1
Question:
A patient with severe hypoxia and acidosis develops compensatory cardiovascular changes to maintain perfusion. Which response is most likely mediated through chemoreceptor activation?
Options:
Increased sympathetic vasoconstrictor activity
Reduced peripheral vascular resistance
Increased renal sodium excretion
Reduced cardiac contractility
Increased vagal slowing of heart rate
Correct Answer:
Increased sympathetic vasoconstrictor activity
Explanation:
Chemoreceptors respond to hypoxia, hypercapnia, and acidosis by increasing sympathetic tone to support BP and tissue perfusion.
MCQ 2
Question:
In normal vascular endothelium, which pairing correctly represents opposing regulators of arteriolar tone?
Options:
Aldosterone and renin
Histamine and heparin
Insulin and glucagon
Nitric oxide and endothelin
Thrombin and fibrinogen
Correct Answer:
Nitric oxide and endothelin
Explanation:
Nitric oxide promotes vasodilation, while endothelin promotes vasoconstriction. Their imbalance contributes to increased peripheral resistance in hypertension.
MCQ 3
Question:
Renin secretion is increased when the macula densa detects which change?
Options:
Increased potassium delivery
Reduced sodium chloride delivery
Increased bicarbonate secretion
Reduced urea reabsorption
Increased glucose filtration
Correct Answer:
Reduced sodium chloride delivery
Explanation:
Low NaCl delivery to the macula densa signals reduced effective renal perfusion and stimulates renin release, activating RAAS.
MCQ 4
Question:
A 34-year-old patient has resistant hypertension and an abdominal bruit. Which secondary cause is most likely?
Options:
Obstructive sleep apnea
Thyroid hypofunction
Essential hypertension
Drug-induced hypertension
Renal artery stenosis
Correct Answer:
Renal artery stenosis
Explanation:
Resistant hypertension with an abdominal bruit suggests renovascular hypertension due to renal artery stenosis.
MCQ 5
Question:
Fundoscopy of a long-standing hypertensive patient shows arteriolar narrowing and arteriovenous crossing changes. Which process best explains these findings?
Options:
Acute retinal detachment
Optic nerve inflammation
Chronic arteriolar wall thickening
Venous thrombosis of retina
Vitreous hemorrhage alone
Correct Answer:
Chronic arteriolar wall thickening
Explanation:
Chronic hypertension causes arteriolar wall thickening and narrowing, producing retinal vascular changes such as arteriolar narrowing and AV nicking.
MCQ 6
Question:
A patient with long-standing hypertension develops exertional chest discomfort despite no major coronary occlusion. Which mechanism best explains increased myocardial vulnerability?
Options:
Increased oxygen demand from hypertrophied myocardium
Reduced systemic afterload during systole
Reduced left ventricular muscle mass
Increased coronary venous drainage
Reduced arterial wall stiffness
Correct Answer:
Increased oxygen demand from hypertrophied myocardium
Explanation:
Hypertensive LV hypertrophy increases myocardial oxygen demand and can contribute to ischemic symptoms.
MCQ 7
Question:
In pre-eclampsia, placental ischemia releases factors that primarily cause which maternal systemic abnormality?
Options:
Increased insulin sensitivity
Reduced platelet activation
Direct fetal adrenal suppression
Widespread endothelial dysfunction
Primary thyroid hormone deficiency
Correct Answer:
Widespread endothelial dysfunction
Explanation:
Placental ischemia in pre-eclampsia leads to maternal endothelial dysfunction, causing hypertension, proteinuria, edema, and organ involvement.
MCQ 8
Question:
A woman known to have high blood pressure before conception is now 12 weeks pregnant. Which classification best applies?
Options:
Gestational hypertension
Chronic hypertension
Pre-eclampsia
Eclampsia
Superimposed eclampsia
Correct Answer:
Chronic hypertension
Explanation:
Hypertension present before pregnancy or before 20 weeks of gestation is classified as chronic hypertension.
MCQ 9
Question:
A pregnant woman with hypertension and proteinuria develops generalized seizures. Which diagnosis is most appropriate?
Options:
Gestational hypertension
Chronic hypertension
Essential hypertension
Placental insufficiency alone
Eclampsia
Correct Answer:
Eclampsia
Explanation:
Eclampsia is pre-eclampsia complicated by seizures.
MCQ 10
Question:
A pregnant patient with severe hypertension requires a drug that reduces BP through both beta-blocking and alpha-blocking actions. Which drug best fits this profile?
Options:
Methyldopa
Amlodipine
Labetalol
Enalapril
Prazosin
Correct Answer:
Labetalol
Explanation:
Labetalol blocks beta receptors and also has alpha-blocking activity, making it useful in pregnancy-related severe hypertension protocols.
MCQ 11
Question:
Methyldopa lowers blood pressure mainly through which pharmacological action?
Options:
Central alpha-2 receptor stimulation
Peripheral alpha-1 receptor blockade
Direct nitric oxide release
Distal tubular sodium blockade
Angiotensin receptor inhibition
Correct Answer:
Central alpha-2 receptor stimulation
Explanation:
Methyldopa is a centrally acting sympatholytic that stimulates central alpha-2 receptors and reduces sympathetic outflow.
MCQ 12
Question:
A patient with hypertension and reduced ejection fraction is prescribed verapamil. Which concern makes this drug unsuitable?
Options:
Excess uric acid retention
Loss of renal sodium excretion
Severe aldosterone blockade
Negative inotropic cardiac effect
Direct cyanide accumulation
Correct Answer:
Negative inotropic cardiac effect
Explanation:
Verapamil reduces cardiac contractility and may worsen heart failure with reduced ejection fraction.
MCQ 13
Question:
A hypertensive patient taking hydralazine develops arthralgia, fever, and positive autoimmune markers. Which adverse effect is most likely?
Options:
Acute gouty arthritis
Drug-induced lupus-like syndrome
Bradycardia with AV block
Cyanide-related toxicity
Severe bronchoconstriction
Correct Answer:
Drug-induced lupus-like syndrome
Explanation:
Hydralazine is a direct arteriolar vasodilator and can cause a lupus-like syndrome.
MCQ 14
Question:
Furosemide produces diuresis by acting mainly on which renal transporter?
Options:
Epithelial sodium channel
Aldosterone receptor
NaCl cotransporter
Renin enzyme complex
Na-K-2Cl cotransporter
Correct Answer:
Na-K-2Cl cotransporter
Explanation:
Loop diuretics such as furosemide inhibit the Na-K-2Cl transporter in the thick ascending limb.
MCQ 15
Question:
A hypertensive patient also has symptoms of benign prostatic hyperplasia. Which drug group may improve both conditions?
Options:
Direct renin inhibitors
Loop diuretics
Alpha-1 blockers
Non-dihydropyridine CCBs
Potassium-sparing diuretics
Correct Answer:
Alpha-1 blockers
Explanation:
Alpha-1 blockers reduce vascular tone and also relax smooth muscle in the prostate and bladder neck.
MCQ 16
Question:
A hypertensive patient with bronchial asthma is prescribed propranolol. Which adverse outcome is most concerning?
Options:
Bronchospasm due to beta-2 blockade
Cough due to bradykinin excess
Edema due to arteriolar dilation
Hyperkalemia due to aldosterone block
Cyanide accumulation during infusion
Correct Answer:
Bronchospasm due to beta-2 blockade
Explanation:
Non-selective beta-blockers can block beta-2 receptors in bronchial smooth muscle and precipitate bronchospasm.
MCQ 17
Question:
A patient with hypertensive emergency is being managed in a monitored setting. Which principle is most appropriate during early treatment?
Options:
Reduce BP to normal immediately
Avoid IV therapy in organ injury
Stop all long-term medications permanently
Lower BP in a controlled gradual manner
Treat only after symptoms disappear
Correct Answer:
Lower BP in a controlled gradual manner
Explanation:
In hypertensive emergency, BP should be reduced carefully to prevent ischemia from sudden hypoperfusion.
MCQ 18
Question:
A hypertensive emergency patient presents with acute pulmonary edema. Which IV drug may be especially useful because of venodilator and anti-ischemic effects?
Options:
Spironolactone
Nitroglycerin
Methyldopa
Hydrochlorothiazide
Prazosin
Correct Answer:
Nitroglycerin
Explanation:
Nitroglycerin is useful when hypertensive emergency is associated with pulmonary edema or myocardial ischemia.
MCQ 19
Question:
During follow-up, a patient reports ankle swelling after starting a BP medicine. Which counselling approach is most professional?
Options:
Advise immediate permanent drug withdrawal
Tell the patient to ignore all swelling
Recommend doubling the next drug dose
Stop follow-up once BP improves
Review the adverse effect and adjust therapy safely
Correct Answer:
Review the adverse effect and adjust therapy safely
Explanation:
Professional counselling encourages reporting side effects and safe adjustment rather than abrupt discontinuation.
MCQ 20
Question:
Before selecting long-term drug therapy for a newly diagnosed hypertensive patient, which step best reflects proper clinical protocol?
Options:
Begin multiple drugs without evaluation
Treat only patients with headache
Assess risk factors and target-organ damage
Avoid lifestyle advice after diagnosis
Use emergency IV drugs first
Correct Answer:
Assess risk factors and target-organ damage
Explanation:
Hypertension management includes confirming BP, assessing risk and organ damage, giving lifestyle advice, and selecting drugs according to patient factors.
📌 Important Exam Strategy
KMU examinations often test integrated understanding rather than isolated facts. Focus on linking anatomy, embryology, histology, and clinical concepts when reviewing questions.
✅ Revision Tip
If you can explain the reason behind the correct answer without looking at notes, your concept is strong.