Inter neurons, not mentioned in the options, are the mot numerous in the human body. They are associated with motor and sensory functions.
It is the nervous system that holds sway in importance, with regard to neurons, for it is responsible for feelings and thoughts and ideas: all those aspects that make us human rather than animal. Neurons can also be classified based on the number of processes involved. The cells can either be multipolar, bipolar, unipolar or pseudounipolar.
Unipolar nuerons are mostly found in invertebrates. Bipolar cells are only associated with afferent impulses. Multipolar cells figure most dominantly in the brain and spinal cord = i.e. thinking, planning and movement - and are inclusive of motor neurons as well as interneurons.
Multipolar-most neurons in the body (over 99%) are multipolar.neurons can be classified based on the number of axons and dendrites stemming off of the cell body. a unipolar neuron has one process which branches off of it this process then immediately divides into two. thus, a unipolar neuron is sometimes also called a pseudounipolar neuron. sensory neurons are unipolar.a bipolar neuron has two process that branch from it: an axon and a dendrite. bipolar neurons are not very common and are found in some of the organs for special senses. bipolar neurons are found in the retina, inner ear, and the region of the nose involved with smell.multipolar neurons have one axon and many (at least two) dendrites that branch off of it. most neurons are multipolar. motor neurons and interneurons are multipolar.