model HodgkinHuxley
    "Predator-Prey Model"
    parameter Real G_Na =120        "conductance";
    parameter Real G_K  =36         "conductance";
    parameter Real G_lk =0.3        "conductance";
    parameter Real C    =1.0        "membrane capacitance";
    parameter Real V_Na =115        "potential";
    parameter Real V_K  =-12        "potential";
    parameter Real V_lk =-49.387    "leakage";
    Real n;
    Real alpha_n;
    Real Beta_n;
    Real m;
    Real alpha_m;
    Real Beta_m;
    Real h;
    Real alpha_h;
    Real Beta_h;
equation
    C * der(V_m) = - G_Na * (Vm - E_Na) - G_K * (V_m - E_K) - G_lk * (V_m - V_lk);
    der(n) = - (alpha_n + Beta_n) * n + alpha_n;
    der(m) = - (alpha_m + Beta_m) * m + alpha_m;
    der(h) = - (alpha_h + Beta_h) * h + alpha_h;
end HodgkinHuxley;