The kinetics of sodium transport in the toad urinary bladder
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- Finn, A.L. & Hutton, S.A. J. Membrain Biol. (1974) 17: 253. doi:10.1007/BF01870186
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The kinetics of sodium movement in the toad urinary bladder were determined as a function of the potassium concentration in the medium. Results indicated that (1) there is a linear relationship between net sodium transport and the measured rate coefficient for the serosal sodium efflux pump; this relationship is independent of serosal [K]; (2) changing potassium concentrations has no effect on sodium entry or exit at the mucosal border of the epithelium; (3) reduction in serosal [K] inhibits the serosal sodium pump, but elevation in [K]s up to 20mm has no effect on the pump in the steady state; (4) changes in [K]s caused reciprocal changes in sodium pool size.