Blood Vessels

In which choice are the blood vessels correctly ranked in order of decreasing wall thickness?

• capillary, vein, artery

• artery, arteriole, metarteriole, capillary

• vein, artery, arteriole

• metarteriole, arteriole, capillary

Which blood vessel is NOT correctly matched with one of its functions?

• arteries - conduct blood away from the heart

• arterioles - return blood from the tissues to the atria

• capillaries - site of exchange of substances between the blood and tissues

• veins - serves as a blood reservoir

Which blood vessel wall layer is correctly matched with a statement about its tissue structure?

• tunica externa (adventitia) - consists of smooth muscle tissue

• tunica interna (intima) - consists of a thin layer of connective tissue only

• tunica media - consists of simple squamous epithelium

• tunica media - consists of smooth muscle and elastic connective tissue, the amounts and proportions of

  each depending on vessel type

The endothelium of the tunica interna secretes chemicals that

• increase cardiac output

• inhibit platelet aggregation & control blood vessel diameter

• decrease heart rate

• nourish the cells in the outer half of the blood vessel wall

The walls of capillaries are made of

• endothelium only

• endothelium and smooth muscle

• a tunica interna and a tunica media

• smooth muscle and elastic connective tissue

Valves in veins

• support them

• protect them

• prevent the backward movement inside them

• provide them elesticity

which of the blood vessels do you think have greatest blood pressure

• veins

• capillaries

• atria

• arteries

What are present in veins but absent in arteries?

• smooth elastic tissues

• muscular tissues

• valves

Which blood vessels take blood AWAY from the heart?

• Veins

• Arteries

• Capillaries

What type of blood do the arteries usually carry?

• Oxygenated Blood

• Deoxygenated Blood