You are walking down the hall. You see someone walking toward you on the same side. You politely move out of the way as he walks by. As he walks by, he says, "Excuse me." You acknowledge him by saying, "That's okay."
In the scenario above, the sensory neurons let you hear the person by them saying "Excuse me" as well as it lets you see the person coming your way. The sensory neurons then send the message that you need to move to the brain using interneurons that move in and out of the nerve cells. When the interneurons reach the central nervous system in the brain the signal (message) is transferred to the motor neurons. From the brain the motor neurons are sent through your body to make you move out of the way, and give you the message to say "That's okay" to the person.
Sensory neurons are nerve cells within the nervous system. They are responsible for converting external stimuli from the organismís environment into internal electrical impulses. They receive impulses through sight, touch, taste, hearing, and smell (the five senses). Their role is to receive the impulses then send them to the interneuronís.
Interneurons are found in the central nervous system in the brain. The interneurons are responsible for processing information that goes to the brain. They also get the signal from the sensory neurons and then transport the signal to the brain then transfers the signal to the motor neurons.
Motor neurons are neurons that originate in the spinal cord. They are responsible for receiving the impulse from brain then send the message throughout your body to perform the action needed. They help you respond to your five senses that come from the brain.