Assertion: tract's axon | /r/CapableOf | maintain constant radius
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Axons are distinguished from dendrites by several features, including shape (dendrites often taper while axons usually maintain a constant radius), length (dendrites are restricted to a small region around the cell body while axons can be much longer), and function (dendrites receive signals whereas axons transmit them).