Veins

safaTerkawi

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2022-08-07

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Veins.

Contain most of the blood volume.
Have a sympathetic vasoconstrictor innervation.
Receive nutrition from vasa vasorum arising from their lumen.
Respond to distension by contraction of their smooth muscle.
Undergo smooth muscle hypertrophy when exposed to high pressure through an arteriovenous fistula.

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safaTerkawi

2022-08-07

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A. True Around three-quarters; veins are referred to as ‘capacitance’ vessels.

B. True These modulate venous capacity.

C. False Their vasa arise from neighbouring arteries.

D. True This ‘myogenic’ response helps to limit the degree of distension.

E. True Another functional adaptation to resist distension.

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