Vascular Caliber Is Controlled by Intrinsic and Extrinsic Regulatory Mechanisms;

Vascular caliber is controlled by intrinsic and extrinsic regulatory mechanisms; these include all of the following except:

A) Circulating acetylcholine
B) The metabolic status of the tissues through which the blood vessels traverse.
C) Vasodilator and vasoconstrictor substances originating in the endothelial cells of the vessel.
D) Norepinephrine levels in the plasma due to incomplete local breakdown.
E) Blood-borne vasoactive chemicals