Question

Ions A and B in the Table below are both monovalent cations associated with a cell with a membrane potential of

-98 mV. Constants you may need to answer the questions associated with the Table are as follows: R = 0.002 kcal/mol ^o;     T = 310^o;     F = 0.023 kcal/mol mV

Ion	ICF (mM)	ECF (mM)
A	14.5	96.8
B	105.6	3.2

1. What is Ion A’s equilibrium potential? (round to nearest whole number and give units)

2. What is the direction (in or out) of Ion B’s electrochemical gradient across the membrane?

Answer 1