CV Pop Quiz

The muscle layer of the heart is the ____.

• endocardium

• ectocardium

• myocardium

• pericardium

The chamber of the heart that receives deoxygenated blood as it returns from body cells is the

• right atrium

• right ventricle

• left atrium

• left ventricle

The valve between the right atrium and right ventricle that prevents blood from flowing back into the right atrium is the ____.

• tricuspid valve

• pulmonary valve

• aortic valve

• mitral valve

The valve between the left atrium and left ventricle that prevents blood from flowing back into the left atrium is the ____.

• tricuspid valve

• pulmonary valve

• aortic valve

• mitral valve

The blood vessels that carry blood away from the heart are the ____.

• arteries

• veins

• venules

• capillaires

The blood vessels that contain valves to prevent blood from flowing in a backward direction are the ____.

• arteries

• veins

• capillaries

• arterioles

The first heart sound is caused by

• the closing of the mitral valve.

• the closing of the semilunar valves.

• the closing of the tricuspid valve.

• both a and c above

The second heart sound is caused by

• the closing of the mitral valve.

• the closing of the semilunar valves.

• the closing of the tricuspid valve.

• both a and c above

This structure is known as the “pacemaker” of the heart.

• Purkinje fibers

• sinoatrial node

• atrioventricular node

• bundle of His

This structure is the part of the conduction system that actually makes the ventricles contract.

• sinoatrial node

• atrioventricular node

• bundle of His

• Purkinje fibers