Assume Ions a and B Are Both Positively Charged

Multiple Choice

Assume ions A and B are both positively charged. Extracellular [A] is 10X intracellular [A]. The neuronal membrane is permeable only to ion B. After B is added to the extracellular solution, which of the following would you expect to be true?

A) B would flow into the cell until it is found in equal concentrations on both sides of the membrane
B) B would flow into the cell and A would flow out of the cell.
C) B would flow into the cell until its equilibrium potential is reached
D) B would not enter the cell