Fig. 2. Representative time course of the uncorrected short-circuit current (I*_sc) across split gill lamellae of shore crabs adapted to 10  salinity showing that ouabain (5 mmol l^–1) completely inhibits the negative I*_sc even in the presence of external amiloride (100 µmol l^–1). The vertical current deflections are due to voltage pulses (1 mV) and directly reflect the (uncorrected) conductance of the preparation in the chamber.

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