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.
a neuron of the central nervous system that connects with sensory, motor, and other interneurons to integrate sensory input with motor input; also known as Association Neuron. Motor Neuron. neuron that carries impulses from the central nervous system to an effector; also known as Efferent Neuron.