we studied the role played by postjunctional adrenoceptors in the vasoconstrictor responses of perfused tail arteries of young prehypertensive ( 4-6 weeks old ) and adult ( 14-16 weeks ) spontaneously hypertensive rats ( shr ) with norepinephrine ( ne ) , phenylephrine and epinephrine .
C0028351
norepinephrine
C0014563
epinephrine