All are true about the Sympathetic vasodilator system except
There is no tonic activity in the vasodilator fibers(sympathetic), but the vasoconstrictor fibers to most vascular beds have some tonic activity Sympathetic noradrenergic fibers end on blood vessels in all pas of the body to mediate vasoconstriction- So sympathectomy cause vasodilation Resistance vessels in skeletal muscles are innervated by vasodilator fibers, which, although they travel with the sympathetic nerves, are cholinergic (sympathetic cholinergic vasodilator system) Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:556
It originates from the frontal coex
It has a strong basal tone
The fibres to skeletal muscles are cholinergic
After sympathectomy, the blood vessels dilate
Cardiovascular system