Contemporary Examples. 1  Cars have national attributes and GM wants their luxury line to grab the glitz of New York instead of the grime of Detroit. 2  Restorers completed a 12-year project in 1998 that cleaned decades of grime from the ceiling. 3  That grime came from the cigarette smoke of millions of commuters.
But one cell doesnât actually touch another, and the signals canât jump across the tiny spaces in between. To cross those tiny gaps, called synapses, they rely on chemical messengers. These chemicals are known as neurotransmitters. And their role in cell talk is called neurotransmission. When an electrical signal reaches the end of a neuron, it triggers the release of tiny sacs that had been inside the cells.
Neurons communicate through an electrochemical process. Sensory receptors interact with stimuli such as light, sound, temperature, and pain which is transformed into a code that is carried to the brain by a chain of neurons. Then systems of neurons in the brain interpret this information.