Brain processes information and send efferent impulse to heart slowing heart and reducing contractility letting blood pressure go down. If heart go down too much, sympathetic reflex speeds it up . They sense O2 levels in blood . CO2 levels go up . CO2 go to dorsal medial medulla.
Brain tells lung to breathe fast .
Baroreceptor And Chemoreceptor Reflexes Baroreceptor reflex maintains blood pressure in narrow range. Chemoreceptor reflex maintain O2 levels. Drugs Drugs can elicit direct and reflexive effects on body. ANS Afferent and efferent components that mediate reflex loops . ANS Functions 1.