Additionally, a huge dendritic tree means that it has a lot of potential for many many connections to other neurons. Therefore, weak signals will maybe not even arrive at the soma since they decay with time. If the dendrites are long, it takes longer until they reach the soma. So the axon is responsible for the temporal delay of the signal conductance, similarily to the dendrite. If the trunk is long, then it will take longer for your friend to catch the ball, if the trunk is short, you might even be able to give it personally to your friend. Think of the signal as a ball that you want to give your friend you let it fall. A friend of yours is sitting on the grass next to the trees roots (which is the terminals in the neuron analogy). You are sitting in the area where all the branches come together and the trunk starts, this could be the same as the soma of a neuron since all dendrites come together.
Different neuron structures change the way the signal is treated and conducted.
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