What is the role of CNS in control of ANS function?

ANS is motor system, requires sensory input, feedback given by streams of afferent impulses from viscera traveling to integrating centers in CNS, these centers send out an efferent reflex via ANS. Reflex arcs: afferent impulses given without consciousness, like fall of BP cause pressure-sensitive neurons to send impulses to cardiovascular center in brain, which leads to reflex increase sympathetic signals and decrease parasympathetic to compensate BP and tachycardia