These famous equations model the squid-axon and are an excellent example of the type of model that one obtains by using the methods of the previous section. The equations are:
corrects for the temperature on the kinetics. The figures below illustrate the kinetic functions and the functions for etc. Note that in all cases the steady state voltage dependence is sigmoidal with n and m monotonically increasing and h decreasing. Also notice that the maximum of the time constant of the sodium activation is about .5 and that of h and n are 8 and 5 respectively. The sodium activation is more than ten times as fast as the inactivation and the delayed rectifier current. Also note that at the activation threshold, the h is nearly zero.