Action potentials are all-or-nothing; they fire at a fixed voltage once the threshold is met, with stronger stimuli increasing frequency rather than amplitude.
Action potentials follow an all-or-nothing principle: once the threshold is reached, they fire at a constant voltage; a stronger stimulus increases the firing frequency, not the amplitude.
| Front | Action potential All-or-Nothing nature |
|---|---|
| Back | Once threshold has been reached, action potential always fire at same voltage If threshold not reached then action potential not fire Bigger stimulus not result in bigger action potential but increases the frequency at which they fire |
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