Suppose that the concentration of Na outside the cell is 100 and inside the cell is 100 mmol/liter. The Nernst equation at 20oC is: You set the membrane voltage at 58 millivolts using a voltage clamp, and measure membrane current. If Na is the only ion crossing the membrane, you would expect to see:

0 current

Explanation:

Given that:

The concentration of Na inside the cell is 100 mmol/liter

The concentration of Na outside the cell is 100 mmol/liter

where;

z(valence of the ionic species for Na⁺ ) = +1, and the membrane voltage is 58 millivolt

Therefore;

answer; i believe the correct answer is ( proteins );