application of 1 mumol/1 utp leads to a rapid ( less than 2 s ) hyperpolarization of the cell membrane by -17.0 +/- 0.4 mv ( from -50.1 +/- 0.6 mv ) , a reduction of cell membrane resistance and an increase of the sensitivity of pd to alterations of extracellular potassium .
C0007634
cell
C0007603
cell membrane