Sodium and chloride transport across the isolated rabbit ciliary body

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Abstract
Unidirectional Na+ and Cl- fluxes were determined in the isolated rabbit ciliary body under short-circuited conditions. A statistically significant net Cl flux towards aqueous was detected in the standard bathing solution (HCO3 = 15 mM), but no net Na flux was demonstrated in this solution. The net Cl flux exceeded the short-circuit current, suggesting the existence of a net flux of other ion_(s). In a bathing solution containing 5 mM HCO3, the net Cl flux was abolished, suggesting that HCO3 in the bathing solution enhances the net Cl flux.