Normally, the coordinated action of the muscles of the stomach and small intestine propels the food from the stomach, through the small intestine and into the colon. This muscular action also sweeps bacteria out of the small intestine and limits the numbers of bacteria in the small intestine.
The term 'motor neuron' is usually restricted to the efferent neurons that actually innervate muscles (the lower motor neurons). A single motor neuron may innervate many muscle fibres and a muscle fibre can undergo many action potentials in the time taken for a single muscle twitch.
All are made of various specialized neurons. A motor neuron is defined by its efferent function: it carries signals away from the central nervous system. In contrast, afferent nerves carrying signals toward the spinal cord and brain are called sensory neurons.he function of a motor neuron is perfectly suited to the function of muscles. The electrical signal they transmit is either positive or negative. Muscles also have a binary state â contract or relax. Ad.