Abstract
Acid stimulation produced a change in trans-epithelial potential difference across isolated dorsal epithelium of frog tongue. The responses to acetic acid, tartaric acid and citric acid were significantly greater than those to hydrochloric acid and nitric acid at the same pH. Metabolic inhibitors had no effect on the response, but local anaesthetics reversibly depressed it. The induced response was associated with a decrease in tissue resistance. Positive polarization on the mucosa increased the response, which was decreased or reversed under negative polarization. These responses may be caused by diffusion of H-ions through the tissue, and may influence sour reception in the frog.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
