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.
Communication between neurons (with a few exceptions in mammals) is a chemical process. When the neuron is stimulated, the electrical signal (action potential) travels down the axon to the axon terminals.When the electrical signal reaches the end of the axon, it triggers a series of chemical changes in the axon terminal.he neuron has processes called dendrites that receive signals and an axon that transmits signals to another neuron. The cell body, also called the soma, is the metabolic center of the neuron. The nucleus is located in the cell body, and most of the cellâs protein synthesis occurs in the cell body.