A problem arises because the electrode is located between the amplifier and the cell, i.e. the resistor that is the electrode is "in series" with the resistor that is the cell's membrane.
A problem arises. The electrode is located between the amplifier. The electrode is located between the cell. The cell is i.e. "in series" with the resistor. This resistor is the cell's membrane. The resistor is. This resistor is the electrode.