blood at po2s ranging from 10 to 90 mm hg was exposed to a 10 ( -3 ) m concentration of the agonists l-isoproterenol , l-epinephrine and l-norepinephrine in the presence and absence of 10 ( -5 ) m dl-propranolol .
C0014563
epinephrine
C0028351
l-norepinephrine