You cannot fire a gun softly or flush a toilet halfway. Like an action potential, gunfire and a toilet's flush follow the "All-or-none " law.
The all-or-none law is a rule that expresses that the quality of a reaction of a nerve cell or muscle fiber isn't needy upon the quality of the improvement. On the off chance that an improvement is over a specific limit, a nerve or muscle fiber will fire. Basically, there will either be a full reaction or there will be no reaction at all for an individual neuron or muscle fiber.