Question

The tip, or ______, of an elongating axon resembles a highly motile, crawling fibroblast, unlike the bulk of the axon that shows little outward evidence of motile activity.

Answer 1

The tip of an elongating axon is known as the axon hillock and resembles a highly motile fibroblast. The axon is a long extension of the cell body that transmits signals to other cells. Axon segments are insulated stretches of the axon with myelin and bounded by nodes of Ranvier.

Step-by-step explanation:

The tip, or axon hillock, of an elongating axon resembles a highly motile, crawling fibroblast, unlike the bulk of the axon that shows little outward evidence of motile activity. The axon hillock is the tapering part of the neuron cell body that gives rise to the axon.

The axon is a long, thin extension of the cell body that transmits nerve impulses away from the cell body and toward other cells. It branches at the end, forming multiple axon terminals where nerve impulses are transmitted to other cells. The axon terminals have complex membrane junctions called synapses.

An axon segment is a single stretch of the axon that is insulated by myelin and bounded by nodes of Ranvier at either end. The axoplasm is the cytoplasm of an axon, which is different in composition than the cytoplasm of the neuronal cell body.