we have evaluated the relative contributions of the sympathetic and parasympathetic nervous systems to the increased mean arterial pressure ( map ) and heart rate ( hr ) elicited by the selective mu-agonist d-ala2 , mephe4 , gly-ol5 enkephalin ( dago ) following microinjection ( 100 nl ) into the nucleus of tractus solitarius ( nts ) of anesthetized , artificially ventilated sprague-dawley rats .
C0014298
enkephalin
C0525773
dago