With respect to the ion gradients across the membrane, which is NOT true? A. Sod
ID: 26260 • Letter: W
Question
With respect to the ion gradients across the membrane, which is NOT true?A. Sodium is about 14 times higher outside the cell than inside and has an equilibrium
potential of about + 50.
B. Calcium is about 10,000 time more concentrated outside the cell than it is in the
cytosol.
- 2 -
C. The potassium concentration is about 140 mM inside the cell and about 5 mM
outside the cell.
D. The chloride concentration inside/outside is the reciprocal of the potassium
concentration inside / outside
E. None
Explanation / Answer
C. The potassium concentration is about 140 mM inside the cell and about 5 mM outside the cell.