Neurons - Image 7
A drawing showing a multipolar neuron with one Nissl body bracketed in red. The insert shows the ultrastructure of Nissl substance; viz., clumps of rough endoplasmic reticulum (rER) and polyribosomes. Notice that Nissl substance extends into the base of each dendrite but not into the axon hillock that gives rise to the axon (black process leaving the bottom of the cell body).
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