Since There Is a Larger Concentration of Potassium Ions Inside

question 4

Multiple Choice

Since there is a larger concentration of potassium ions inside a neuron,why is the inside of the neuron negative (-70mV) relative to the outside?

• A)Potassium ions carry a negative charge.
• B)Negatively-charged proteins inside the cell counteract the charge of the potassium ions.
• C)The negative sign is just a historical convention.
• D)The high concentration of sodium ions outside the cell makes the inside negative by comparison.

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