A columnist is someone who writes for publication in a series, creating an article that usually offers commentary and opinions. Columns appear in newspapers, magazines and other publications, including blogs. They take the form of a short essay by a specific writer who offers a personal point of view.
This positive spike constitutes the action potential: the electrical signal that typically moves from the cell body dlown the axon to the axon terminals. The electrical signal moves down the axon like a wave; at each 84 Ch apter 3 Biopsycholo gy point, some of the sodium ions that enter the cell diffuse to the neJ1.'t section of the axon, raising the charge past the threshold of excitation and triggering a new influx of sodium ions.
A single axon usually transmits electrical impulses away from the cell body to other neurons. Electrical messages ordinarily travel in only one direction: Information comes into a cell through a dendrite, is processed in the cell body, and passes through the axon.he electrical charge in the neuron travels down the axon by means of a chemical process that is different from, and much slower than, a household electrical current. Source(s): http://marionmoon.hubpages.com/hub/What-... protexya Â· 3 years ago.