The action potential range and the conductive velocity of the nerve trunk of bull frog ( Rana catesbeiana) were measured at nine time (0, 24, 48, 96, 120, 144, 168, 192 and 216 h) under two (5℃ and 15℃ ) temperatures. Results showed that there was no significant difference of the action potential range at 0 and 24 h under the two temperatures. The conductive velocity at 0 h under the relative high temperature (15℃ ) was greater than that under the lower temperature (5℃) , however, there was no difference of the conductive velocity between two temperatures at 24 h. The action potential range and the conductive velocity of the nerve trunk could not be examined at 48 h under 15℃ , whereas, they could maintain at a relative high level for one week under 5℃.%在5℃和15℃温度条件下,用牛蛙(Rana catesbeiana)离体坐骨神经标本测定0、24、48、96、120、144、168、192、216 h 9个时段的动作电位波幅和传导速度.结果表明:两个温度下离体坐骨神经的动作电位幅度在0 h和24 h差异均不显著,0 h时相对高温(15℃)下动作电位传导速度大于相对低温(5℃),24 h时两个温度下动作电位的传导速度差异不显著,相对高温下48 h时坐骨神经的兴奋性为零.相对低温条件下,坐骨神经兴奋性能维持7 d时间.
展开▼
