The logarithms of the steady-state permeability coefficients
(P) were plotted against the logarithms of the HEM
electrical resistances (R) of the transport for TEA and ARA
in Figs. 2 and 3, respectively. The data from a previous 50 and
1,000 Hz AC transport study (3) are also presented in the
figures for comparison. The passive transport data in the
previous study were combined with those in the present study
and served as the baseline. These figures show good
correlations between HEM permeability coefficient and
HEM electrical resistance under the passive and AC
conditions, with the log P vs log R linear correlations
providing slopes of approximately j1. This relationship is
consistent with the transport theory when the background
electrolytes and the permeants have similar molecular sizes.