Vasomotor Tone Is

Question

Vasomotor tone is
A) a vasoconstrictor effect caused by background firing of the sympathetic nerves.
B) a vagally induced peripheral vasodilation.
C) caused by parasympathomimetic drugs.
D) caused by sympatholytic drugs.

Accepted Answer

Vasomotor tone is the level of vascular smooth muscle tone maintained by the sympathetic nervous system via background firing of sympathetic nerves. This tone can be adjusted by increasing or decreasing sympathetic activity, resulting in vasoconstriction or vasodilation, respectively.