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M2M Unit IV > Blood Vessels > Flashcards

Blood Vessels Flashcards

1
Q

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

A

inner elastic lamina; outer elastic lamina

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1
Q

What is a pampiniform plexus?

A

A countercurrent arrangement between an artery and venous network

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2
Q

Fenestrations in the liver sinusoids permit blood plasma to _____.

A

directly contact the liver cells

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3
Q

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

A

outer; collagenous tissue

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3
Q

______ have surrounding pericytes.

A

Post-capillary venules

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5
Q

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

A

tunica media

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5
Q

The adventitia is comparatively thick and contains ____ and ______.

A

collagen; elastin

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5
Q

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

A

Arterioles

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6
Q

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

A

alternate arterial supply

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7
Q

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

A

endothelial layer; outer layers

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8
Q

_______ are similar to smooth muscle cells

A

Myointimal cells

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8
Q

The pulmonary arteries function under ____ pressure.

A

low

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9
Q

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

A

Larger arteries

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10
Q

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

A

media; adventitia

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11
Q

The ______ defines the boundary between the media and adventitia.

A

outer elastic lamina

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11
Q

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

A

adventia; media; connective tissue

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11
Q

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

A

adjacent connective tissue

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12
Q

The _____ is primarily comprised of smooth muscle cells.

A

media

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13
Q

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

A

tunica adventitia

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14
Q

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

A

glomerulus; of the kidney

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15
Q

The media is primarily comprised of _______.

A

smooth muscle cells

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16
Q

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

A

endothelial cells; basement membrane

17
Q

The ______ is comparatively thick and contains collagen and elastin.

A

adventitia

19
Q

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

A

thick-walled; thick-walled

20
Q

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

A

tunica intima

21
Q

What are pericytes?

A

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

23
Q

The tunica media is comprised of multiple layers of _____, ______, and ______.

A

elastic laminae, smooth muscle cells, collagen

24
Q

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

A

pores

26
Q

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

A

elastic arteries

28
Q

Where are myointimal cells?

A

in elastic arteries

28
Q

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

A

inner elastic lamina

30
Q

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

A

Arterioles

32
Q

The _______ and _______ are referred to as elastic arteries.

A

aorta and larger arteries branching from it

33
Q

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

A

vasa vasorum

34
Q

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

A

1-2 endothelial cells

35
Q

Where is a pampiniform plexus found?

A

in the spermatic cord

36
Q

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

A

fenestrated capillaries

37
Q

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

A

intima; media

38
Q

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

A

endothelial cells; connective tissue

39
Q

Capillaries are about _____ in inner diameter.

A

5-15μm

40
Q

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

A

Lymphatics

42
Q

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

A

Pericytes

43
Q

Arterioles are immediately surrounded by ______ and outer ______.

A

1-2 layers of smooth muscle cells; collagenous tissue

44
Q

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

A

intima

44
Q

______ may be contractile in nature.

A

Pericytes

46
Q

Post-capillary venules have surrounding ______.

A

pericytes

47
Q

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

A

intimal cells

47
Q

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

A

End arteries

49
Q

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

A

endothelial cells

50
Q

Fenestrations permit _____ past the endothelial boundary.

A

bulk flow of plasma

51
Q

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

A

adventitia; blood vessels

52
Q

What are muscular venules?

A

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

53
Q

The ______ is between the intima and the media.

A

inner elastic lamina

54
Q

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

A

30-40

M2M Unit IV (11 decks)

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