alpha (activated by NE)

  • a1 – postsynaptic excite (constriction)  => vasoconstrict
  • a2 – presynaptic inhibit (dilation) => inhibit NE release, vasodilate, ↓BP

 

beta (activated by E)

  • b1– postsynaptic excite => ↑ heart fxn & metabolism
  • b2 – postsynpatic inhibit => bronchodilation, relax uterine muscle, ↑ eye pressure, relax muscles