Chapter 4 Review Questions

Question 1

What is the function of the vasa vasorum?

Answer 1

to supply needed material to nearby cells in vessel wall

Question 2

Which major luminal wall layer is thickest/most dominant within elastic arteries?

Answer 2

tunica media

Question 3

What is the tunic media primarily made of in elastic arteries?

Answer 3

fenestrated elastic laminae and smooth muscle

Question 4

Which major luminal wall layer is thickest/most dominant within muscular arteries?

Answer 4

tunica media

Question 5

What is the tunica media primarily made of in muscular arteries?

Answer 5

smooth muscle

Question 6

Which major luminal wall layer is thickest/most dominant within arterioles?

Answer 6

tunica media

Question 7

What is the tunica media primarily made of in arterioles?

Answer 7

smooth muscle

Question 8

Why is the endothelium of the tunica intima prone to develop problems in elastic arteries?

Answer 8

fast moving luminal blood

Question 9

What general tissue type makes up the tunica adventitia of arteries?

Answer 9

CT

Question 10

Which type of artery has the most developed internal elastic lamina?

Answer 10

muscular artery

Question 11

Which is the thinnest of the major luminal wall layers in arteries?

Answer 11

tunica intima

Question 12

Which type of artery has the thickest tunica intima?

Answer 12

elastic artery

Question 13

Which type of artery is most likely to have degeneration of its tunica intima?

Answer 13

elastic artery

Question 14

Identify whether it’s metarteriole or AVA:

lacks a true tunica media

Answer 14

metarteriole

Question 15

Identify whether it’s metarteriole or AVA:

thicker tunica media and tunica adventitia

Answer 15

AVA

Question 16

Identify whether it’s metarteriole or AVA:

associated with vessels called thoroughfare channels

Answer 16

metarterioles

Question 17

Identify whether it’s metarteriole or AVA:

found with all capillary beds

Answer 17

metarterioles

Question 18

Identify whether it’s metarteriole or AVA:

redirects much blood away from capillary beds

Answer 18

AVA

Question 19

Identify whether it’s metarteriole or AVA:

which enables the functioning of erectile tissues?

Answer 19

AVA

Question 20

Which type of vessel will divert blood away from capillary beds?

Answer 20

AVA

Question 21

Which type of vessel allows for the pulsing of blood through true capillaries?

Answer 21

metarterioles

Question 22

Which cell type, with reparative potential, is found exterior to capillaries and venules?

Answer 22

pericytes

Question 23

Which cell types can pericytes change into?

Answer 23

fibroblasts, endothelial cell, smooth muscle

Question 24

Do lymphatic capillaries have pericytes?

Answer 24

No

Question 25

Do lymphatic capillary endothelial cells join together using tight junctions?

Answer 25

No

Question 26

Why do lymphatic capillary endothelial cell have attached anchoring filaments?

Answer 26

support the tiny endothelial cell openings to allow interstitial fluid to enter and leave lymph capillaries

Question 27

Do medium and large lymphatic vessels have 3 major luminal wall layers? If so, what are the layer names?

Answer 27

Yes; tunica intima, tunica media, tunica adventitia

Question 28

In general, the structure of lymphatic vessels most closely resembles that of… (hint: another blood vessel type)

Answer 28

veins