In calcium-free Krebs-Henseleit solution, the inhibition of enflothelium-dep-endent relaxation induced by acetylcholine in rabbit aortic spiral strips was observed, but the inhibition was antagonized when Ca~(2+) was added.

• 在无Ca~(2+)krebs-Henseleit液中,Ach诱发兔主动脉松弛受抑制,恢复Ca~(2+)后抑制解除。