Firstly, the effect of a neuron's spatial stucture on the dependency of the receptor potential for a constant pheromone-dependent conductance is studied. It is shown that the ability to discriminate is improved by considering a cable model instead of a point model neuron. Secondly, we compare the firing frequency when the passive backpropagation of action potentials is ignored [2,4 with the frequency when this backpropagation is included. For certain sets of parameters, the inclusion of backpropagation has little effect.