Cardiovascular Practice

What prevents blood from flowing back into the atria when the ventricles contract?

• semilunar valves

• sinoatrial node

• atrioventricular node

• tricuspid and bicuspid valves

When blood leaves this chamber of the heart, it heads out to the body (not the lungs)

• left atrium

• right atrium

• left ventricle

• right ventricle

This initiates the action potential that causes the heart to beat (the "pacemaker")

• Inferior vena cava

• Atrioventricular node (AV node)

• Superior vena cava

• Sinoatrial node (SA node)

When blood leaves this chamber of the heart, it heads to the lungs

• right atrium

• right ventricle

• left atrium

• left ventricle

This chamber of the heart receives oxygenated blood from the lungs

• right atrium

• right ventricle

• left atrium

• left ventricle

These are the smallest blood vessels with the thinnest walls in order to maximize diffusion of nutrients in and out of the interstitial fluid

• arteries

• veins

• capillaries

• aorta

These carry blood towards the heart

• arteries

• veins

These carry blood away from the heart

• Arteries

• Veins

How many chambers does the heart have ? 

• 4
• 6
• 3
• 1

Systolic pressure measures which of the following?

• atrial contraction
• atrial relaxation
• ventricular contraction
• ventricular relaxation