The image above is that of a greatly enlarged multipolar neuron, the most common type of neuron found in humans. Notice that the cell body (1) contains the nucleus (2) with its conspicuous darkly staining nucleolus (3). Branching from the cell body are cytoplasmic extensions called nerve cell processes. In motor neurons (which conduct nerve impulses toward muscle cells), these processes consist of a single, long axon (4) and many of shorter dendrites (5).