Spinal cord.
It is called a dendrite.~
Motor neurons.
Axons and dendrites that go to or from the same region of the body travel together in bundles, somewhat like telephone cables. A nerve is a bundle of axons and/or dendrites in the PNS. A bundle of axons and/or dendrites in the CNS is called a tract.for more info see link below
nerve tract
Not all efferent neurons are motor; some can be autonomic (meaning they control involuntary functions). Similarly, not all afferent neurons are sensory; some can be visceral (relaying information from internal organs). CNS neurons can include interneurons that integrate and transmit signals between sensory and motor neurons, but not all CNS neurons are interneurons, as there are also sensory and motor neurons found within the CNS.
Efferent neurons (sometimes called motor neurons) transmit signals from the CNS to the effector cells.
Interneurons are neurons entirely within the central nervous system (CNS). They function to relay signals between sensory neurons and motor neurons, allowing for complex processing and integration of information within the CNS.
The usual name for a bundle of nerve processes within the CNS is "tract" or "fasciculus"
An interneuron is also called an association neuron. Its job is to communicate with other neurons.
Neurons or the nerve cells are the basic unit of nervous system. Based on their function (as in whether they transmit impulse from the CNS or to the CNS) neurons are classified as sensory neurons (carry impulses to the CNS), motor neurons (carry impulses from the CNS to the target organ) and mixed neurons which perform both the functions. The neurons can also be classified based on the number of associated axons or even presence or absences of axons.
Sensory neurons are called afferent neurons because they carry information from sensory receptors to the central nervous system. "Afferent" means to carry inward, referring to the direction of information flow towards the central nervous system.
Motor neurons, also called efferent or effector neurons condust impulses away from the CNS to muscles and glands.Motor neurons tracts (including those from the autonomic nervous system) are called effector pathways. This is because they mediate actions like an increased heart rate or vasoconstriction.