injections of serotonin ( 5-ht ) into the aortic arch of rats caused greater reductions of blood pressure ( bp ) and less increases in renal vascular resistance ( rvr ) than that into jugular veins , in contrast to norepinephrine ( ne ) which tended to cause larger increases in bp and rvr by the intra-aortic route .
C0020649
reductions
C0028351
norepinephrine