we conclude that the low membrane potential of quiescent coronary sinus cells reflects not a low [ k ] i but rather a relatively high ratio pna/pk , of about 0.07 : the na ions flow into the cells via predominantly ttx-insensitive pathways and are extruded by the electrogenic na/k exchange pump , which thereby makes a substantial contribution to the resting potential .
C0007603
the
C0007634
the