The size of the action potential, then, is not at all related to the intensity of the stimulus. The nondecremental characteristic of the action potential means that once a neuron begins conducting, the impulse is propagated to the very end of the axon without diminishing. A stronger stimulus will result in a large excitatory potential while a weaker stimulus will result in a weaker potential. There are many different kinds of external stimuli. But whatever the external stimulus the internal consequence is always the movement of chemicals resulting in the propagation of a neural impulse.
All neural conduction is electrochemical.
Here is a diagram of a nerve fiber of a neuron showing the different charges on fluids inside and outside the cell membrane. Check the velocity given below that might describe the speed of a neural impulse along an axon. Name the potentials indicated by the numbers. Write the numbers 1 through 5 to show the proper order of the following events. 6 Fill in the following chart to describe neurons in the resting and conducting state.