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 Coastal Range region, also known as the Coast Range or the Pacific Coast Range, is an ecological area that traces the coasts of Washington, Oregon and northern California. Visitors to the area can glimpse many examples of the region's distinctive flora, fauna and geological formations.