Blood Vessels And Nerves Flashcards

1
Q

What are the layers of the general structure of blood vessels

A
Endothelium 
Basement membrane 
Intima 
Internal elastic lamina 
Media 
External elastic lamina 
Adventitia
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2
Q

What is the intima

A

Loose connective tissue

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3
Q

What is the media

A

Smooth muscle, some fibroblasts, collagen and elastin

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4
Q

What is the adventitia

A

Loose connective tissue

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5
Q

What are the elastic arteries

A

Aorta and pulmonary arteries

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6
Q

What do elastic arteries have

A

Concentric sheets of elastin

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7
Q

What are the types of arteries

A

Muscular and elastic

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8
Q

What is an arteriole

A

Has 3 or fewer muscular layers
Less than 100 um in diameter
Poorly defined elastic lamina

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9
Q

What is the capillary structure

A

Endothelium and basement membrane

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10
Q

What regulates the size of capillaries

A

Pericytes

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11
Q

Where are fennestrated capillaries found

A

Kidneys and liver

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12
Q

What is the difference between the structure of veins and arteries

A

Veins have no external elastic lamina, a thinner media and wider lumen

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13
Q

Where is myelin produced

A

Schwann cells

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14
Q

What are the connective tissues of the peripheral nerves

A

Endoneurium
Perineurium
Epineurium

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15
Q

What is the function of endoneurium

A

Binds together individual axons

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16
Q

What is the function of perineurium

A

Binds together bundles of axons to form fascicles

17
Q

What is the function of epineurium

A

Binds fascicles together to form nerve fibres

18
Q

What is a neurovascular bundle

A

A nerve, arteriole and venule

19
Q

How is myelin produced in the PNS

A

A spiral of opposed Schwann cell membranes

An individual Schwann cell wraps around an individual axon multiple times to produce myelin

20
Q

What are the gaps between Schwann cells

A

Nodes of Ranvier

21
Q

What is the difference between myelinated axons and non myelinated axons

A

Multiple Non myelinated axons are supported by one Schwann cell
Myelinated axons are supported by only one Schwann cell at a time

22
Q

Where are the cell bodies of lower motor neurones

A

Grey matter if spinal cord

23
Q

Where are sensory nerve cell bodies

A

Dorsal root ganglion