1) The muscular layer of blood vessels is the

A) tunica intima.

B) tunica externa.

C) tunica media.

D) tunica interna.

E) tunica adventitia.

2) Thick-walled vessels, which are large and extremely resilient, are called ________ arteries.

A) coronary

B) pulmonary

C) elastic

D) muscular

E) arteriolar

3) The external carotid artery would be classified as an example of a(n) ________ artery.

A) anastomotic

B) elastic

C) conducting

D) large

E) muscular

4) The outermost layer of the arterial wall is the

A) endothelium.

B) tunica intima.

C) tunica externa.

D) tunica media.

E) serosa.

5) The vessels that permit exchange of materials between the blood and the surrounding interstitial fluid are termed

A) capillaries.

B) arterioles.

C) arteries.

D) venules.

E) veins.

6) Which vessel type typically has an internal diameter of about 30 μm and has a tunica media comprised of 1-2 layers of smooth muscle cells?

A) capillaries

B) muscular arteries

C) arterioles

D) venules

E) elastic arteries

7) Which condition is described as the formation of lipid deposits in the tunica media associated with damage to the endothelial lining?

A) atherosclerosis

B) phlebitis

C) thrombus

D) aneurysm

E) pulmonary embolism

8) Blood flowing out of a capillary bed first enters structures called ________.

A) arterial anastomoses

B) venous valves

C) arteriovenous anastomoses

D) precapillary sphincters

E) venules

9) Which vessel type typically lacks a tunica media when its diameter is less than 50 μm?

A) venules

B) veins

C) arterioles

D) arteries

E) capillaries

10) In general, for a vessel of a given size, a typical artery ________ compared to a typical vein.

A) is more elastic

B) has less smooth muscle in its tunica media

C) has no endothelium

D) has thinner walls

E) has a larger lumen