The motor neurons communicate with cells via chemical synapse to produce a certain reaction to a given stimulus, therefore a stronger stimulus produces a stronger reaction from the organism. If a particular stimulus is larger than another, then more receptors of the sensory cells (which detect stimuli) will be stimulated which will ultimately trigger a larger response. In a typical unmyelinated axon, the action potential is conducted at a rate of about 5 meters per second, compared to a myelinated human neural fiber which conducts at around 120 meters per second.[2]