the sodium-potassium pump in the basolateral membrane of the epithelial cell, cotransporter proteins in the apical membrane of the epithelial cell, and higher sodium ion concentration in the lumen than in the epithelial.

Harry Robert Bremner has written:

'Promoter analysis and genomic organization of the gene encoding the [beta]-subunit of the rat amiloride-sensitive epithelial sodium channel'

David Hanwell has written:

'Trafficking and cell surface stability of the epithelial Na+ channel expressed in epithelial MDCK cells'

a sodium channel blocker would (increase;decrease) serum sodium levels outside of normal resting nerve cells

The sodium/potassium pump, the sodium leak channel and the potassium leak channel.