Table 7.

The ion channel and transporter density coefficients listed for the ID and the SD. All parameters (except $L_A$ and $L_B$) are scaled up by 40, so that the final saliva reaches spatial steady states at the duct end

Notation	Intercalated	Striated	Unit	Description
$G_{\mathrm{ENaC}}$	0.01	0.8	S m${}^{-2}$	Apical ENaC channel
$G_{\mathrm{CaCC}}$	1	0	S m${}^{-2}$	Apical CaCC channel
$G_{\mathrm{CFTR}}$	0	15	S m${}^{-2}$	Apical CFTR channel
$G_{\mathrm{BK}}$	0.1	1	S m${}^{-2}$	Apical Maxi-K channel
$G_{K_B}$	0.1	4	S m${}^{-2}$	Basolateral K${}^{+}$ channel
${\alpha }_{{\mathrm{NKA}}_B}$	0.1E $-$ 8	0.8E-8	mol m${}^{-2}$	Basolateral NaK ATPase
${\alpha }_{{\mathrm{AE}2}_A}$	0.002	0.002	–	Apical anion exchanger
${\alpha }_{{\mathrm{AE}2}_B}$	0.005	0.005	–	Basolateral anion exchanger
${\alpha }_{{\mathrm{NHE}}_A}$	0.0002	0.0002	–	Apical Na${}^{+}$/H${}^{+}$ exchanger
${\alpha }_{{\mathrm{NHE}}_B}$	0.0005	0.0005	–	Basolateral Na${}^{+}$/H${}^{+}$ exchanger
${\alpha }_{{\mathrm{NBC}}_A}$	0	1500	–	Apical Na${}^{+}$/HCO${}_3^{-}$ cotransporter
${\alpha }_{{\mathrm{NBC}}_B}$	2253	2253	–	Basolateral Na${}^{+}$/HCO${}_3^{-}$ cotransporter
$G_{\mathrm{Na}}^P$	0.3	0.15	S m${}^{-2}$	Paracellular Na${}^{+}$ conductance
$G_K^P$	0.3	0.3	S m${}^{-2}$	Paracellular K${}^{+}$ conductance
$G_{\mathrm{Cl}}^P$	0.5	0.35	S m${}^{-2}$	Paracellular Cl${}^{-}$ conductance
$L_A$	0.6	0	µm/s	Apical water permeability
$L_B$	0.6	0.6	µm/s	Basolateral water permeability