The cellular determinants of K+ secretion in the principal cell include the intracellular K+ concentration, the luminal K+ concentration, the potential (voltage) difference across the luminal membrane, and the permeability of the luminal membrane for K+.
The average cost for a brake pad replacement, resurface rotors is between $254 to $361. Labor costs are estimated between $182 to $231 while parts are priced between $72 to $130.
The rotors price is very high and you want to prevent metal from every touching the surface of your rotor or drum which can be avoided by proper brake pad maintenance. A full service will include the replacement of the pads and shoes along with resurfacing the face of the rotors.