Na+60 90 回Na Nat Nat Na+60-Na 回血 0 90 mV Vm=-65 mV Vm=o mv 60 Na №a+60 30 m=+20m Vm=+30 mV the m gate, the h gate tends to open the channel close the channel as vm as Vm becomes less becomes less negative. negative. Hence, this is Hence this is called an called an activation gate. inactivation gatethe m gate, tends to open the channel as Vm becomes less negative. Hence, this is called an activation gate. the h gate, close the channel as Vm becomes less negative. Hence, this is called an inactivation gate