circulatory system

What statement about veins is true ?

• They collapse easily when not filled with blood

• Sometimes the diameter of red cells exceeds that of veins, causing the red cells to become compressed as it flows through the vein

• They are the strongest of the three types of blood vessels

• Their smooth muscle lining gives them great elasticity

A disease of the circulatory system characterized by fatty deposits in the walls of the arteries which reduces the amount of blood going to an organ is:

• atherosclerosis

• emphysema

• angina pectoris

• phlebitis

Which statement best describes the pumping action of the heart?

• the heart is a single, muscular pump

• the heart functions as a double pump

• each heart chamber pumps independently

• blood flow through the heart is a result of negative pressure

What special conducting cells originate an electrical impulse that begins and regulates the heart beat they also cause the atria to contract?

• SA node

• AV node

• purkinje fibers

• atrioventricular bundle

Mark is admitted to the hospital with a diagnosis of a myocardial infarction [MI]. His doctor thinks mark may have had a/an:

• heart attack

• internal malignancy

• muscle inversion

• right mitral insufficiency

Enlarged veins which can be painful, inflamed and not as effective in returning blood to the heart are known as:

• arteriosclerosis

• myocarditis

• pericarditis

• varicose veins

The vessels that are located on the outer surface of the heart to provide its oxygen supply are the:

• carotid arteries

• coronary arteries

• hepatic arteries

• pulmonary arteries

The bicuspid [mitral] valve is located between the:

• left atrium and left ventricle

• left atrium and right ventricle

• right atrium and left ventricle

• right atrium right ventricle

What large artery does blood enter as it leaves the left ventricle of the heart?

• aorta

• carotid

• jugular

• vena cava

The chamber of the heart pumping blood to the body is the:

• left atrium

• left ventricle

• right atrium

• right ventricle