Which statement applies to vasoconstriction
A)an increase in the radius of a vessel
B)decreases blood flow through an arteriole
C)increases blood flow through an arteriole
D)can be caused in an arteriole by parasympathetic activation

Question

Quizplus · Accepted Answer

Vasoconstriction is the narrowing of a blood vessel, which reduces its diameter and increases resistance in the vessel. This results in a decrease in blood flow through the arteriole. Choice A is incorrect because an increase in the radius of a vessel is called vasodilation. Choice C is incorrect as blood flow decreases with vasoconstriction. Choice D is incorrect because parasympathetic activation generally causes vasodilation rather than vasoconstriction.

Which Statement Applies to Vasoconstriction