Quiz sur le système cardiovasculaire

What are the three main components of the cardiovascular system?

• Heart, lungs, arteries

• Heart, blood vessels, blood

• Lungs, veins, plasma

What type of blood is carried by the pulmonary arteries?

• Oxygenated

• Deoxygenated

• Mix of oxygenated and deoxygenated

What is the role of autorhythmic cells in the heart?

• Create mechanical force for contraction

• Initiate and conduct action potentials

• Transport oxygenated blood

Which wave of the ECG represents the depolarization of the atria?

• P wave

• QRS complex

• T wave

Which phase of the cardiac cycle corresponds to the contraction of the ventricles?

• Ventricular diastole

• Atrial systole

• Ventricular systole

What causes the first heart sound 'Lub'?

• Opening of the aortic valves

• Closing of the AV valves

• Closing of the semilunar valves

What is the volume of blood pumped by the heart in one minute called?

• Stroke volume

• Cardiac output

• Heart rate

What does 'positive chronotropy' mean?

• Decrease in heart rate

• Increase in heart rate

• Stabilization of heart rate

What is the normal value of systolic blood pressure in an adult?

• 80 mmHg

• 120 mmHg

• 100 mmHg

What is the resting cardiac output in an average adult?

• About 2 L/min

• About 5 L/min

• About 10 L/min