WorksheetsCardiovascular System Quiz
Total questions: 20
Worksheet time: 10mins
What is the clinical definition of hypertension?
BP > 130/80 mmHg
BP > 120/80 mmHg
BP > 140/90 mmHg
BP > 150/95 mmHg
Which hormone plays a major role in long-term regulation of blood pressure?
Adrenaline
Renin
Angiotensin II
Aldosterone
Which of the following causes secondary hypertension?
Essential hypertension
Renal artery stenosis
Salt sensitivity
Genetic mutation
Which structure initiates the cardiac contraction?
AV node
Bundle of His
Purkinje fibers
SA node
Cardiac muscle relaxation primarily depends on?
Opening of Na+ channels
Ca2+ influx
Ca2+ reuptake into sarcoplasmic reticulum
ATP hydrolysis
In myocardial infarction, ECG shows?
Tall T wave
ST depression
ST elevation
Prolonged QT
Which of the following is seen in hypokalemia?
Tall T wave
Short QT
ST elevation
U wave
Which ECG finding is typical in hyperkalemia?
Flattened T wave
Tall peaked T wave
U wave
Prolonged PR interval
Which is true about Wolff-Parkinson-White Syndrome?
PR interval is prolonged
Wide QRS and delta wave present
SA node fails
QT interval is shortened
Which blood vessels supply the heart during diastole?
Pulmonary arteries
Coronary arteries
Aorta
Carotid arteries
Phasic coronary blood flow means?
Flow is constant during cardiac cycle
Flow occurs only during systole
Flow is greater in diastole than systole
Flow stops during exercise
Which factor increases coronary blood flow during exercise?
Decreased heart rate
Increased oxygen tension
Increased H+ and adenosine
Increased BP
Which of the following indicates myocardial ischemia?
Bradycardia
ST elevation
Tall P waves
Prolonged QT interval
What is the triple response to injury?
Flare, wheal, pain
Flare, wheal, blister
Redness, wheal, flare
Redness, pain, pus
Which mediator is mainly responsible for the wheal in triple response?
Histamine
Bradykinin
Serotonin
Substance P
Which of these is a short-term BP regulation mechanism?
Renin-angiotensin system
Baroreceptor reflex
ADH secretion
Aldosterone activity
What is the physiological basis of antihypertensive ACE inhibitors?
Increase Na+ reabsorption
Stimulate aldosterone
Inhibit angiotensin II formation
Activate sympathetic system
Which drug class reduces preload and afterload?
Beta-blockers
Calcium channel blockers
Nitrates
Diuretics
What does a delta wave in ECG indicate?
Hyperkalemia
Hypokalemia
Wolff-Parkinson-White syndrome
Myocardial infarction
Which ion is most responsible for the plateau phase of cardiac action potential?
Na+
K+
Ca2+
Mg2+
