In a typical mammal neuron, the membrane potential must surpass to produce an action potential. At this point, what happens to the sodium activation gate

Voltage threshold

Explanation:

The action potential threshold or voltage threshold is the minimum voltage that the membrane must reach to cause the mass opening of voltage-dependent sodium channels, that is, to trigger an action potential.

The frequency of action potentials, on the other hand, depends on the intensity of the original stimulus.

Only stimuli  significant enough to exceed the threshold are transmitted as information and encoded in the form of  action potentials along the axon to other neurons.

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there are two significant figures.