circulatory system process
 |__vascular process in circulatory system__
 |__blood circulation_______________________|
regulation of tube size                     |
 |__regulation of tube diameter_____________|
                                            blood vessel diameter maintenance
                                             |__maintenance of blood vessel diameter homeostasis by renin-angiotensin
                                             |   |__angiotensin-mediated vasoconstriction involved in regulation of systemic arterial blood pressure
                                             |   |__angiotensin-mediated vasodilation involved in regulation of systemic arterial blood pressure
                                             |__regulation of vasoconstriction
                                             |   |__negative regulation of vasoconstriction(+)
                                             |   |__positive regulation of vasoconstriction(+)
                                             |   |__regulation of vascular associated smooth muscle contraction(+)
                                             |   |__regulation of vasoconstriction by epinephrine(+)
                                             |   |__regulation of vasoconstriction by norepinephrine(+)
                                             |__vasoconstriction
                                             |   |__angiotensin-mediated vasoconstriction involved in regulation of systemic arterial blood pressure
                                             |   |__norepinephrine-epinephrine vasoconstriction involved in regulation of systemic arterial blood pressure
                                             |   |__regulation of vasoconstriction
                                             |   |__vascular associated smooth muscle contraction(+)
                                             |   |__vasoconstriction by vasopressin involved in systemic arterial blood pressure control
                                             |   |__vasoconstriction of artery involved in baroreceptor response to lowering of systemic arterial blood pressure
                                             |   |__vasoconstriction of artery involved in chemoreceptor response to lowering of systemic arterial blood pressure(+)
                                             |   |__vasoconstriction of artery involved in ischemic response to lowering of systemic arterial blood pressure
                                             |__vasodilation
                                                 |__acetylcholine-mediated vasodilation involved in regulation of systemic arterial blood pressure
                                                 |__angiotensin-mediated vasodilation involved in regulation of systemic arterial blood pressure
                                                 |__artery vasodilation involved in baroreceptor response to increased systemic arterial blood pressure
                                                 |__epinephrine-mediated vasodilation
                                                 |__norepinephrine-epinephrine-mediated vasodilation involved in regulation of systemic arterial blood pressure
                                                 |__norepinephrine-mediated vasodilation
                                                 |__relaxation of vascular associated smooth muscle
                                                 |__vasodilation involved in acute inflammatory response