the observed changes in membrane voltage are not attributable to a phi-dependent increase in cell membrane k+ permeability ( pk ) , because 1 ) the cell membrane resistances increased and 2 ) elevating solution partial pressure of co2 ( pco2 ) to counterbalance the cellular alkalinization on mucosal cl- removal caused a further hyperpolarization of the cell membranes to values greater than ek .
C0007603
cell membrane
C0007634
cell