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.
The Sierra Nevada is the rugged mountain range that cuts across a portion of Nevada south of Carson City. Lake Tahoe, a beautiful glacial lake, on the California/Nevada border lies in one of the valleys of the Sierra Nevada. The rest of the state is part of the Basin and Range Region. This region is divided by more than 150 mountain ranges running from north to south. The Basin and Range Region is bordered on the west by the Sierra Nevada. In the center of the state are the Toiyabe and Toquima mountain ranges. In the east are the Snake and Toana mountain ranges.