Chapter 7

What is the function of the circulatory system?

• To deliver oxygen, nutrients, hormones, and enzymes to the cells

• To transport cellular waste to the organs

• To circulate blood throughout the body

• All of the above

Which layer of the heart is responsible for supplying blood to the heart?

• Endocardium

• Myocardium

• Epicardium

• Coronary arteries

How many chambers does the heart have?

• Two

• Three

• Four

• Five

Which valve connects the right atrium and right ventricle?

• Tricuspid valve

• Pulmonary valve

• Mitral valve

• Aortic valve

Which circulation carries deoxygenated blood from the right ventricle to the lungs?

• Pulmonary circulation

• Systemic circulation

• Coronary circulation

• Renal circulation

What is the purpose of capillaries in the circulatory system?

• To carry oxygenated blood away from the heart

• To exchange oxygen, carbon dioxide, nutrients, and waste between blood and tissue cells

• To carry deoxygenated blood back to the heart

• To supply blood to the heart

What is the purpose of hemodialysis?

• To deliver oxygen, nutrients, hormones, and enzymes to the cells

• To transport cellular waste to the organs

• To purify blood in patients with end-stage renal failure

• To enlarge veins for easier blood access

What is an AV fistula?

• A surgical procedure to enlarge a vein for hemodialysis

• A connection between an artery and a vein using a synthetic tube or graft

• A type of vascular access that tends to last longer than other types

• A procedure to purify blood in patients with end-stage renal failure

What is the main difference between an AV fistula and an arteriovenous graft?

• An AV fistula requires advanced planning, while an arteriovenous graft can be used sooner

• An AV fistula tends to have more clotting and infection problems than an arteriovenous graft

• An AV fistula is a connection between an artery and a vein, while an arteriovenous graft is an artificial vein

• An AV fistula is used for hemodialysis, while an arteriovenous graft is used for renal circulation

Which layer of the blood vessels is responsible for the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and tissue cells?

• Tunica adventitia

• Tunica media

• Tunica intima

• Capillaries