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.
Mountain Range Mountain ranges generally belong to the same geological structure, and consist of a series of peaks and ridges surrounded by lowlands and valleys. There are many mountain ranges in Canada, including the Rocky Mountains, the St. Elias Mountains and the Laurentian Mountains. Description . A mountain range is a linear arrangement of mountain peaks and ridges surrounded by adjacent lower land or clearly separated from adjacent ranges by intervening valleys.