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 Mountains formed by a thinning of the North American Plate which then cracked as a result of upward pressure. Huge blocks of rock containing huge chunks of gâ¦ranite welled up at this crack and tilted up along it. The upward tilting edges became the Sierra Nevada ridge line less than 4mya.