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 western states are located west of the Rockies. Mountain ranges found in this region include the Alaska Range, Cascade Range, Sierra Nevada, and the Coastal Ranges. The Great Basin covers most of Nevada, and parts of Idaho, Oregon, and California. Many desert areas are found in the Great Basin.