A cellular suspension from rat submandibular glands was exposed to different concentrations of NH4Cl, and the variations of the intracellular concentration of calcium ([Ca2+] i) and the intracellular pH (pHi) were measured using fura‐2 and 2′, 7′‐bis‐(2‐carboxy‐ethyl)‐5 (6)‐carboxyfluorescein. More than 5 mmol/l NH4Cl significantly increased t(...)