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.
All circuit breakers are overcurrent protection devices, which are used to disconnect a circuit in the event of a prolonged overload current or a short-circuit current. An aiâ¦r circuit breaker is one of many types of high-voltage circuit breaker. It uses a blast of compressed air to extinguish the arc formed when its main contacts open. In some cases, air pressure is also used to operate the mechanism that opens and closes the main contacts. 4 people found this useful.