Cardiovascular system for Paramedics Part 2

The cusps (leaflets) of atrioventricular valves are attached to papillary muscle by...

• pericardium

• trabeculae carneae

• chordae tennidae

• interatrial septa

The bicuspid or mitral valve is located

• in the opening of the aorta.

• in the opening of the pulmonary trunk.

• where the venae cavae join the right atrium

• between the left atrium and the left ventricle

Compared to arteries, veins

• are more elastic.

• have more smooth muscle in their tunica media

• hold their shape better when cut.

• have thinner walls

After blood leaves the capillaries, it enters the

• arteries.

• arterioles.

• venules.

The 'Lub' sound of the heart is caused by .....

• Atrioventricular valves closing

• Semilunar valves closing

• Blood flowing through the Pulmonary artery and aorta

• Blood Flowing down into the ventricles

Why are the walls of the left ventricle thicker than that of the right ventricle?

• The left ventricle must force blood into all the capillaries of the lungs 
• The left ventricle doesn't need to contract very hard

• This is false, the walls of the right ventricle are thicker
• Blood from the left ventricle is pumped throught the entire body 

The chamber that receives oxygenated blood from the lungs

• Right Ventricle

• Left Ventricle

• Right Atrium

• Left Atrium

A flap of tissue that prevents blood from flowing backward

• Aorta
• Atrium
• Septum
• Valve

The chamber that pumps deoxygenated blood to the lungs

• Right Ventricle

• Right Atrium

• Left Ventricle

• Left Atrium

Which of the following is true about the semi-lunar valves in the heart?

• They are between atria and ventricles

• They close when pressure in the arteries is higher than pressure in the atria

• They prevent backflow of blood into the atria

• They open when pressure in the ventricles is higher than pressure in the arteries