Chloroform Extract of Artemisia annua L. Relaxes Mouse Airway Smooth Muscle

Figure 6

K⁺ channel blockers enhance ACh-induced contraction. (a) TEA-Cl, a nonselective blocker of K⁺ channels, significantly potentiated ACh-induced contractions, which were eliminated completely by CEAA. (b) Paxilline, a selective blocker of BK channels, noticeably potentiated ACh-induced contraction, which was then inhibited by CEAA.

(a)

(b)