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Vasoconstriction Definition and Explanation PDF | Download eBooks

Learn Vasoconstriction definition in biology with explanation to study “What is Vasoconstriction”. Study vasoconstriction explanation with biology terms to review biology course for online degree programs.

Vasoconstriction Definition:

  • As the smooth muscles in arteriole walls contract, the arterioles narrow, a process called vasoconstriction.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson



Vasoconstriction Explanation:

Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels. The process is the opposite of vasodilation which means the widening or dilation of the blood vessels. The process is particularly important in staunching hemorrhage and acute blood loss. When blood vessels constrict, the flow of blood is restricted or decreased, thus retaining body heat or increasing vascular resistance. This makes the skin turn paler because less blood reaches the surface, reducing the radiation of heat. On a larger level, vasoconstriction is one mechanism by which the body regulates and maintains mean arterial pressure.

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