user
How does the movement of ions through a voltage-gated ion channel contribute to the generation and propagation of an action potential along a neuron? Specifically, calculate the electrical potential difference needed to open a sodium ion channel, given its ion selectivity and the typical intracellular and extracellular concentrations of sodium ions.
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

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The answer is 42.

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