Nerve cell (neuron)
The dorsal root is sensory (all neurons conduct impulses into the spinal cord) while the ventral root is motor (all neurons conduct impulses out of the spinal cord). The dorsal root has a ganglion that contains the cell bodies of the sensory neurons that pass through the dorsal root. Visceral efferent neurons are motor neurons that conduct impulses to smooth muscle, cardiac muscle, & glands. These neurons make up the Autonomic Nervous System. Some visceral efferent neurons begin in the brain; others in the spinal cord. At the majority of synapses, signals are sent from the axon of one neuron to a dendrite of another. There are, however, many exceptions to these rules: neurons that lack dendrites, neurons that have no axon, synapses that connect an axon to another axon or a dendrite to another dendrite, etc. There are also other types of neurons that have consistent effects on their targets, for example excitatory motor neurons in the spinal cord that release acetylcholine, and inhibitory spinal neurons that release glycine. The distinction between excitatory and inhibitory neurotransmitters is not absolute, however. A motor neuron (or motoneuron) is a nerve cell (neuron) whose cell body is located in the spinal cord and whose fiber (axon) projects outside the spinal cord to directly or indirectly control effector organs, mainly muscles and glands. The interface between a motor neuron and muscle fiber is a specialized synapse called the neuromuscular junction. Upon adequate stimulation, the motor neuron releases a flood of neurotransmitters that bind to postsynaptic receptors and triggers a response in the muscle fiber which leads to muscle movement. There are upper motor neurons and lower motor neurons, with the cell type described above being a lower motor neuron. Upper motor neurons are cortico-spinal interneurons that arise from the motor cortex and descend to the spinal cord where they activate the lower motor neurons through synapses. The interface between a motor neuron and muscle fiber is a specialized synapse called the neuromuscular junction. Upon adequate stimulation, the motor neuron releases a flood of neurotransmitters that bind to postsynaptic receptors and triggers a response in the muscle fiber which leads to muscle movement. Link to CNS. The cell bodies of the sensory neurons leading to the spinal cord are located in clusters, the dorsal root ganglia (DRG), next to the spinal cord. Their axon extends in both directions: a peripheral axon to receptors at the periphery and a central axon passing into the spinal cord.  Somatic efferent neurons are motor neurons that conduct impulses from the spinal cord to skeletal muscles. These neurons are multipolar neurons, with cell bodies located in the gray matter of the spinal cord. Somatic efferent neurons leave the spinal cord through the ventral root of spinal nerves. Visceral efferent neurons are motor neurons that conduct impulses to smooth muscle, cardiac muscle, & glands. These neurons make up the Autonomic Nervous System. Some visceral efferent neurons begin in the brain; others in 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. The interface between a motor neuron and muscle fiber is a specialized synapse called the neuromuscular junction. Upon adequate stimulation, the motor neuron releases a flood of neurotransmitters that bind to postsynaptic receptors and triggers a response in the muscle fiber which leads to muscle movement. Multipolar neurons are the most common type of neuron. They are located in the central nervous system (brain and spinal cord) and in autonomic ganglia. Multipolar neurons have more than two processes emanating from the neuron cell body.  Fig. 1. Schematic drawing of bipolar, unipolar, and multipolar neurons.  Synaptic signals from other neurons are received by the soma and dendrites; signals to other neurons are transmitted by the axon. A typical synapse, then, is a contact between the axon of one neuron and a dendrite or soma of another. Synaptic signals may be excitatory or inhibitory. There are also other types of neurons that have consistent effects on their targets, for example excitatory motor neurons in the spinal cord that release acetylcholine, and inhibitory spinal neurons that release glycine. The distinction between excitatory and inhibitory neurotransmitters is not absolute, however. A typical neuron consists of a cell body (soma), dendrites, and an axon. The term neurite is used to describe either a dendrite or an axon, particularly in its undifferentiated stage. There are also other types of neurons that have consistent effects on their targets, for example excitatory motor neurons in the spinal cord that release acetylcholine, and inhibitory spinal neurons that release glycine. The distinction between excitatory and inhibitory neurotransmitters is not absolute, however.
http://people.eku.edu/ritchisong/301notes2b.html https://en.wikipedia.org/wiki/Neurons https://en.wikipedia.org/wiki/Motor_neuron https://en.wikipedia.org/wiki/Motor_neuron http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/N/Neurons.html http://people.eku.edu/ritchisong/301notes2b.html https://en.wikipedia.org/wiki/Motor_neuron http://vanat.cvm.umn.edu/neurLab1/neuron.html https://en.wikipedia.org/wiki/Neurons https://en.wikipedia.org/wiki/Neurons
Motor neurons are considered to be what type of neurons