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A reflex arc is a neural pathway that controls a reflex action. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.his characteristic allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain, although the brain will receive sensory input while the reflex is carried out. Analysis of the signal takes place after action has been taken.
Mainly reflexes are there to prevent â¦ injuries because it's much faster than a voluntary response (actions/response you control). A reflex arc is basically: A stimulus is detected by the receptors in a sense organ.he signal goes up the sensory nerve to the spinal cord and then down a motor nerve to produce the motion. All of the processing of the signal is done in the spinal cord. An autonomic reflex involves different centers in the brain and does not always trigger motion.