Answer: a greater-than-threshold depolarization results and sodium permeability into the cell increases to overcome the potassium exiting.
When the stimulus voltage is increased _______.
Whether the voltage is increased or decreased the change propagates passively to nearby regions of the membrane (as described by the cable equation and its refinements). Typically the voltage stimulus decays exponentially with the distance from the synapse …
If the intensity of the stimulus is increased the height of the spike always remains the same. In short the propagated impulse in a single fibre cannot be graded by grading the intensity or duration of the stimulus. The nerve fibre gives a maximum response or none at all. This is called the "all or none" principle.
All-or-none law - Wikipedia
All-or-none law - Wikipedia
Threshold potential - Wikipedia
Depolarization - Wikipedia
However once a stimulus activates the voltage -gated sodium channels to open positive sodium ions flood into the cell and the voltag...
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