Arenas Normal arteriolar tone To capil anes Cross section Vasoconstriction o’ arteriole (increased cont acton of circular smooth muscle in the artero Heart contracting an a, which lea练to Caused by: (a creased resstance and decreased Oxygen(oJ row through the vessel) Carbon doxide (CoJ) and other metabolon I Sympathetic stimulaton Arenes Vasopressin angotensin目 fEE Caused by ttt土毛 co. and otne measues 4 Sympathetic stmulation Histamine release Heart relaxing and fillin Heat Peripheral resistance and vascular tone and elasticityPeripheral resistance and vascular tone and elasticity