Q:

The usefulness of having elastic arteries is in:

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The usefulness of having elastic arteries is in:


  1. their ability to regulate blood pressure.
  2. their ability to expand as the heart pumps blood into them
  3. the assistance they give to venous return.
  4. their ability to produce vasoconstriction and vasodilation

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B: The expansion of arteries as blood is pumped into them limits resistance to flow and blood pressure. Smooth muscle in the wall produces vasoconstriction and vasodilation

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