Electrical Responses of Non-Taste Cells in Frog Tongue and Palate to Chemical Stimuli

概要

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The response characteristics of non-taste epithelial cells on the dorsal and ventral surface of the tongue and the palate of the bullfrogs were investigated with microelectrodes. The resting potential of the non-taste cells ranged from - 11.7 to - 20. 1 mV, which was smaller than that in taste cells of the tongue . The mean amplitudes of depolarizing and hyperpolarizing responses of non-taste cells on the dorsal surface of the tongue for 0.5 mM acetic acid, 0.5 M NaCl, 10 mM quinine-HCl (Q-HCl) and water except for 1 M sucrose were mostly similar to those of the responses in taste cells. The time to peak of depolarizing responses in non-taste cells was the shortest (1-5 sec) with acetic acid, middle (7-21 sec) with sucrose and Q-HCl and the longest (26-34 sec) with NaCl. These values were almost the same as those in taste cells. It is probable that a depolarization of non-taste epithelial cells in response to taste stimuli is initiated by the generative mechanisms similar to those of a depolarization of taste cells.
社団法人日本動物学会の論文
1994-06-15