Fig. 5.

Acid–base regulatory abilities of PMCs in the presence of low (5 mM) Na⁺, without HCO₃⁻ and with 100 µM amiloride. (A) Original recordings of control and treatment traces representing average values of four to five single measurements. Presence of NH₃/NH₄⁺-induced alkalosis and the washout-induced acidosis under the three experimental conditions. (B) The recovery given in percentage of the initial value, before alkalosis in response to control and treatment conditions. (C) Recovery rate represented by the compensatory slope after acidosis given in percentage of the control (100%) value, in response to control and treatment conditions. Bars represent ±SD; n = 4–5.