Table 2. Constants and other parameters.

description	parameter
Faraday constant: F	C mol−1
Boltzmann constant:	JK−1
elementary charge: e	C
Gas constant:	8.3145 J K−1mol−1
Temperature: T	T = 273.15+25 = 298.15 K
: Reversal potential for ATPase contribution in all pumps. It is the same at both tip and shank	−0.45V [7], [8].
	0.02569 V
Rate constants for ion exchange between both tip and shank	s−1, s−1, s−1, s−1
Volume at both tip and shank	µm3, µm3
Surface that is occupied by transporters to volume ratio at both tip and shank are the same	µm−1
The volume ratio between tip and shank:
Membrane capacitance at tip and shank	Fm−2