Membrane Potential (mv)
200
150
100
50
0
-50
-100
-150
-200
60
45
30
15
0
K+
Na+
Cl-
Outside [1]
1
600
Inside [1]
1
200
E
x
=
61.5
log
[ion]
o
z
[ion]
i
[Nernst]