One of the following ions is twenty times more concentrated inside than outside the membrane surface:
Correct answer: B. Potassium
- A. Sodium
- B. Potassium
- C. Organic ions
- D. None of these
Explanation
Potassium ions are much more concentrated inside a resting neuron, roughly twenty to thirty times higher than outside. Sodium shows the opposite pattern, being more concentrated outside the membrane.
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