Abstract
In view of the toxicity of chromium (Cr3+) ions, it was explored the damaging effects that this ion could induce in cell membranes. The measurement of the effects induced by Cr3+ ions on electrophysiological parameters of short-circuit current and on the potential difference were investigated using the outer side (mucosal) and the inner side (serosal) of toad Pleurodema thaul skin. The results showed a decreased on electrophysiological parameters when it were administered concentrations of 33, 100 and 200 μM of Cr3+, the results also suggest that the administration of Cr3+ inhibits the ion transport in toad skin by the interaction of Cr3+ with lipid bilayers or protein constituents of membrane, and not by an inhibition of the active transport of ions across Na+ channels.
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