. "A process that is triggered by vasomotor excitation and results in a decrease in the diameter of an artery during the baroreceptor response to decreased blood pressure." . . . "vasoconstriction of artery involved in baroreceptor response to lowering of systemic arterial blood pressure" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .