When a nerve is cut, both the nerve and the insulation are severed. Sometimes, the fibers inside the nerve break while the insulation remains intact and healthy. If the insulation has not been cut, the end of the fiber farthest from the brain dies. The end that is closest to the brain does not die.
circuit breaker. n. 1. An automatic switch that stops the flow of electric current in a suddenly overloaded or otherwise abnormally stressed electric circuit. 2. An automatic halt or suspension in the trading on a stock exchange that takes effect in response to a specified amount of loss.
wikiHow to Change a Circuit Breaker. A circuit breaker is connected to an electrical circuit and is designed to stop the power flow though the circuit in the event there is an excessive amperage draw on said circuit. Occasionally, however, these breakers go bad, and you will need to know how to change a circuit breaker.