Fig. 7. Relationships between Ca²⁺ entry into the endolymph and the chemical gradient of calcium across the saccular epithelium of trout. Ca²⁺ entry (mmol l^-1 35 min^-1) corresponds to the difference in endolymph calcium levels between t=0 and t=35 min, by which time equilibrium was reached (see Results, Fig. 4). Calcium gradient (mmol l^-1) corresponds to the difference between calcium levels in the endolymph and the Ringer solution at the beginning of the perfusion. Regression lines are shown together with their equations and significances, which have been calculated with paired data. N values are given in parentheses.

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