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If the potassium ion concentration outside the axon of a neuron was 10 mM, and the...

If the potassium ion concentration outside the axon of a neuron was 10 mM, and the membrane potential was −70 mV (inside of the axon negative relative to outside of the axon), what must be the concentration of potassium ions inside the axon? Assume no ion leakage (i.e., assume Donnan equilibrium conditions) and that other ions can be ignored. Assume also that the temperature is 37 °C.

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