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Term I: Histology > Microvasculature I > Flashcards

Microvasculature I Flashcards

1
Q

What is a portal circulatory system?

A

Transfers blood from one capillary bed to another capillary bed

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2
Q

What types of cells make up tunica intima?

A

Endothelial cells

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3
Q

What types of cells make up tunica media?

A

Smooth muscle and fibers (elastic, reticular)

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4
Q

What types of cells make up tunica adventitia?

A

Connective tissue - fibroblasts and fibers (elastic), some smooth muscle

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5
Q

Which layer of the vessel has a basal lamina?

A

Tunica intima, tunica media (smooth muscle)

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6
Q

Which layer has the vasa vasorum?

A

Tunica adventitia

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7
Q

What types of junctions do endothelial cells have?

A

Tight junctions and gap junctions

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8
Q

What type of intermediate filament is present in endothelial cells?

A

Vimentin

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9
Q

What makes up the subendothelial space?

A

Loose connective tissue (occasional smooth muscle and fibroblasts), elastic collagen Type I fibers, internal elastic lamina

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10
Q

What connects vascular smooth muscle?

A

Gap junctions

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11
Q

What secretes the fibers in the tunica media? What type of collagen is used?

A

Smooth muscle

Type III

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12
Q

Give examples of large elastic arteries.

A

Aorta, common carotid, subclavian, common iliac arteries

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13
Q

What boundary separates tunica intima from tunica media?

A

Internal elastic lamina

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14
Q

What is main role of large elastic arteries?

A

Smooth out the flow, maintain diastolic pressure

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15
Q

What is main role of muscular arteries?

A

Conduct blood under pressure and regulate lumen diameter

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16
Q

How does subendothelial space differ in arterioles?

A

There is very little of it compared to arteries

17
Q

What is the terminal end of an arteriole called?

A

Metarteriole - has a precapillary sphincter that opens and closes to capillaries

18
Q

What types of nerves innervate arterioles?

A

Postganglionic, unmyelinated vasomoter nerves

19
Q

What type of active transport do capillaries use?

A

Transcytosis

20
Q

At what end of capillary is hydrostatic force applied?

A

Arteriole end

21
Q

At what end of capillary is osmotic force applied

A

Venule end

22
Q

What are the two basic types of capillaries?

A

continous and fenestrated

Term I: Histology (15 decks)

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