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.
Among the mountain ranges within the southern portion are Berkeley Hills, Mount Diablo, the Santa Cruz Mountains and Diablo Range of the San Francisco Bay Area, and the Gabilan Range, Santa Lucia Range, and Temblor Range of the Central Coast.