The threshold voltage in an axon, specifically in the context of neurons, is typically around -55 mV (millivolts). This is the critical level to which the membrane potential must be depolarized for an action potential to be initiated. When the membrane potential reaches this threshold, voltage-gated sodium channels open, leading to a rapid influx of sodium ions and the generation of an action potential. However, it's important to note that the exact value can vary slightly among different types of neurons.
1 The threshold voltage in an axon is usually
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