Chloride transport in red cells of the teleost, Tilapia mossambica

Abstract

1. 1. The transcellular movement of chloride was measured in the red blood cells of the fish Tilapia mossambica utilizing 36-chloride. 2. 2. Tilapia red cells possess an efficient anion carrier which is totally blocked by SITS. 3. 3. Although a factor in tilapia plasma inhibits the dehydration of extracellular bicarbonate by the red cells, it was without effect on the transcellular movement of chloride. 4. 4. It is concluded that the inability of fish whole blood to dehydrate extracellular bicarbonate is not explained by a general anion impermeability as was suggested by Haswell & Randall (1976).