Muscles: Action Potentials And Obstacles

Satisfactory Essays
The all-or-none principle states that the strength at which a muscle fiber or nerve may respond to a stimulus is independent of the strength of the stimulus. The axon hillock, or trigger zone, is the first place we see voltage gated ion channels. The action potentials from the trigger zone then go down the axon to the axon terminal. The action potential then communicates with it’s target.The nerve or muscle fiber will give a complete response if the stimulus exceeds the threshold potential, otherwise it will give no response at all. The “all” part of the all-or-none principle happens when the stimulus produces a depolarizing graded potential that is able to reach threshold and are constant in magnitude.If it does not reach threshold its returns
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