Gustatory Transduction in Frog Taste Cell for Acid and Bitter Stimulations

Abstract

We studied gustatory transduction in frog taste cells for acid and bitter stimulations. It is concluded that the receptor potential in response to HCl in a taste cell is primarily generated by cations passing through Ca²⁺ channels at the apical receptor membrane. The receptor potential in response to quinine-HCl of a bitter substance is generated by a secretion of intracellular Cl^- ions through the receptor membrane.