Vasomotor tone is:
A) a vasoconstrictor effect caused by background firing of the sympathetic nerves.
B) a vagally induced vasoconstriction.
C) a response to activation of the muscarinic receptors on the blood vessels.
D) caused by a beta-adrenergic antagonist.

Question

Quizplus · Accepted Answer

Background sympathetic firing keeps the blood vessels somewhat constricted. This sympathetically induced continuous state of blood vessel constriction is called vasomotor tone or sympathetic tone.

Vasomotor Tone Is