Arteries and Arterioles 2

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5 Terms

1
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what controls blood flow through the nervous system?

  • nervous system

  • hormones

2
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Vasoconstriction

  • narrowing of the vessel diameter

  • less blood is delivered to tissues

3
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Vasodilation

  • widening of the vessel diameter

  • more blood is delivered to tissues

4
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when do arterioles leading to capillaries open

when cells in that area require blood

5
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precapillary sphincters

regulate the movement of blood from the arterioles into capillaries