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.
California Coast Ranges. The Coast Ranges of California span 400 miles (640 km) from Del Norte or Humboldt County, California south to Santa Barbara County. The other three coastal California mountain ranges are the Transverse Ranges, Peninsular Ranges and the Klamath Mountains.