Blood Vessels

Question 1

The multiple elastic layers in elastic arteries become restricted to two well-defined elastic layers in muscular arteries, the ______ and an ______.

Answer 1

inner elastic lamina; outer elastic lamina

Question 1

What is a pampiniform plexus?

Answer 1

A countercurrent arrangement between an artery and venous network

Question 2

Fenestrations in the liver sinusoids permit blood plasma to _____.

Answer 2

directly contact the liver cells

Question 3

The _____ supporting layer is the tunica adventitia and is comprised of ______.

Answer 3

outer; collagenous tissue

Question 3

______ have surrounding pericytes.

Answer 3

Post-capillary venules

Question 5

The ______ is a layer in the middle of the vessel.

Answer 5

tunica media

Question 5

The adventitia is comparatively thick and contains ____ and ______.

Answer 5

collagen; elastin

Question 5

_____contain an inner lining of endothelial cells on a thin basement membrane.

Answer 5

Arterioles

Question 6

End arteries supply a section of a tissue that cannot have an ______.

Answer 6

alternate arterial supply

Question 7

Lymphatics have only a single, very thin ______ and little discernable ______.

Answer 7

endothelial layer; outer layers

Question 8

_______ are similar to smooth muscle cells

Answer 8

Myointimal cells

Question 8

The pulmonary arteries function under ____ pressure.

Answer 8

low

Question 9

______ also have a layer of elastic and loose collagenous tissues containing intimal cells.

Answer 9

Larger arteries

Question 10

The outer elastic lamina defines the boundary between the ____ and _______.

Answer 10

media; adventitia

Question 11

The ______ defines the boundary between the media and adventitia.

Answer 11

outer elastic lamina

Question 11

In smaller muscular arteries, the _____ is about the same width as the ______, and usually merges with surrounding _______.

Answer 11

adventia; media; connective tissue

Question 11

Pericytes are surrounded by collagenous fibrils which connect the capillary to _____.

Answer 11

adjacent connective tissue

Question 12

The _____ is primarily comprised of smooth muscle cells.

Answer 12

media

Question 13

The outer supporting layer is the ______ and it is comprised of collagenous tissue.

Answer 13

tunica adventitia

Question 14

A good example of fenestrated endothelium is found in the ________.

Answer 14

glomerulus; of the kidney

Question 15

The media is primarily comprised of _______.

Answer 15

smooth muscle cells

Question 16

Arterioles contain an inner lining of ______ on a thin _____.

Answer 16

endothelial cells; basement membrane

Question 17

The ______ is comparatively thick and contains collagen and elastin.

Answer 17

adventitia

Question 19

Arteries are _____ as compared to veins, and have approximately the same _______ as the lumen of the vessel itself.

Answer 19

thick-walled; thick-walled

Question 20

The ______ comprises the inner layer of the vessel and contains a layer of endothelial cells in contact with the blood.

Answer 20

tunica intima

Question 21

What are pericytes?

Answer 21

unspecialized cells that can give rise to smooth muscle cells during vessel growth and wound healing

Question 23

The tunica media is comprised of multiple layers of \_\_\_\_\_, \_\_\_\_\_\_, and \_\_\_\_\_\_.

Answer 23

elastic laminae, smooth muscle cells, collagen

Question 24

In fenestrated capillaries there are ____ or fenestrations in the endothelial cells.

Answer 24

pores

Question 26

The aorta and larger arteries branching from it are referred to as \_\_\_\_\_\_\_.

Answer 26

elastic arteries

Question 28

Where are myointimal cells?

Answer 28

in elastic arteries

Question 28

Small veins have an intimal layer of endothelial cells and no \_\_\_\_\_\_.

Answer 28

inner elastic lamina

Question 30

\_\_\_\_\_\_ are immediately surrounded by 1-2 layers of smooth muscle cells and outer collagenous tissue.

Answer 30

Arterioles

Question 32

The _______ and _______ are referred to as elastic arteries.

Answer 32

aorta and larger arteries branching from it

Question 33

In larger vessels, the adventitia contains blood vessels. These are called the \_\_\_\_\_\_.

Answer 33

vasa vasorum

Question 34

Capillaries are the smallest vessels and have ______ surrounding the lumen.

Answer 34

1-2 endothelial cells

Question 35

Where is a pampiniform plexus found?

Answer 35

in the spermatic cord

Question 36

In ______ there are pores or fenestrations in the endothelial cells.

Answer 36

fenestrated capillaries

Question 37

The inner elastic lamina is between the ____ and the \_\_\_\_.

Answer 37

intima; media

Question 38

The intima is thin and contains _____ and a relatively thin layer of \_\_\_\_\_\_.

Answer 38

endothelial cells; connective tissue

Question 39

Capillaries are about _____ in inner diameter.

Answer 39

5-15μm

Question 40

\_\_\_\_\_\_ have only a single, very thin endothelial layer and little discernable outer layers.

Answer 40

Lymphatics

Question 42

\_\_\_\_\_ are surrounded by collagenous fibrils which connect the capillary to adjacent connective tissue.

Answer 42

Pericytes

Question 43

Arterioles are immediately surrounded by ______ and outer \_\_\_\_\_\_.

Answer 43

1-2 layers of smooth muscle cells; collagenous tissue

Question 44

The ____ is thin and contains endothelial cells and a relatively thin layer of connective tissue.

Answer 44

intima

Question 44

\_\_\_\_\_\_ may be contractile in nature.

Answer 44

Pericytes

Question 46

Post-capillary venules have surrounding \_\_\_\_\_\_.

Answer 46

pericytes

Question 47

Larger arteries also have a layer of elastic and loose collagenous tissues containing \_\_\_\_\_\_\_.

Answer 47

intimal cells

Question 47

\_\_\_\_\_\_ supply a section of a tissue that cannot have an alternate arterial supply.

Answer 47

End arteries

Question 49

Small veins have an intimal layer of _____ and no inner elastic lamina.

Answer 49

endothelial cells

Question 50

Fenestrations permit _____ past the endothelial boundary.

Answer 50

bulk flow of plasma

Question 51

In larger vessels, the _____ contains \_\_\_\_\_. These are called the vasa vasorum.

Answer 51

adventitia; blood vessels

Question 52

What are muscular venules?

Answer 52

larger venules with 1-2 layers of smooth muscles in their media

Question 53

The ______ is between the intima and the media.

Answer 53

inner elastic lamina

Question 54

How many elastic layers are found in the intima of the aorta?

Answer 54

30-40