What is th...
1 year ago
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Vasoconstriction is when blood vessels are narrowed through the contraction of pre-capillary sphincters, whereas vasodilation is when blood vessels are widened through relaxation of the pre -capillary sphincters
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Vasoconstriction is the narrowing of blood vessels and happens to blood vessels in the skin when a person is cold to conserve heat energy.
Vasodilation is the widening of blood vessels and happens to blood vessels in the skin when a person is hot to allow heat energy to be lost.
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