a three-part experiment was designed to show whether hypoxemia alters splanchnic vasomotor responses to other stresses by vasodilating splanchnic organs , preventing norepinephrine ( ne ) -induced vasoconstriction , or altering total sympathetic nervous activity ( sna ) assessed by plasma levels of ne and epinephrine ( epi ) .
C0028351
norepinephrine
C0014563
epinephrine