structure of axon. in nervous system: Axon. The axon arises from the soma at a region called the axon hillock, or initial segment. This is the region where the plasma membrane generates nerve impulses; the axon conducts these impulses away from the soma or dendrites toward other neurons.
The type of land form that the Sierra Nevada and coastal ranges have is called a basin.
1 Sierra Nevada-The Sierra Nevada mountains, located in the states of California and Nevada, are about 400 miles long. 2  The name Sierra Nevada is Spanish for snowy mountains, because of the snow-capped peaks of the range.