The all-or-none law applies to an axon part(s) of a neuron.
When a strong enough stimulus results in an action potential, a neuron sends information down an axon and toward the synapse.
The all or none law is applied to each individual fiber of a motor unit. This idea states that when a motor unit is subjected to a stimulus that is potent enough to elicit a response, all of the muscle fibers will contract simultaneously and as forcefully as is possible.
In physiology, the all-or-none law (also known as the all-or-none principle or all-or-nothing law) states that if a single nerve fiber is activated, it will always respond maximally and generate an electrical impulse with a single amplitude.
learn more about an axon here:
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