In vitro preparations of rabbit descending colon were studied under steady-state short-circuit
conditions to determine 1) the K concentration dependence of unidirectional K fluxes; 2) the …

The results of previous studies indicate that the bidirectional fluxes of K across short-
circuited rabbit descending colon are attributable to passive diffusion through paracellular …

Previous studies of rabbit descending colon have disagreed concerning potassium transport
across this epithelium. Some authors reported active K+ secretion under in vitro short …

We measured isotopic unidirectional fluxes of K to elucidate the mechanisms of active K
transport across the distal colon of the rabbit. Separate pathways for active K absorption and …

1. Adrenaline (5 microM) stimulated a K+ secretory current by 2.2 mu equiv h‐1 cm‐2 in
isolated guinea‐pig distal colonic epithelium. This secretory activity was inhibited entirely by …

Measurements of K fluxes under a variety of conditions have provided an internally
consistent set of data that demonstrate active absorption and active secretion of K by rabbit …

The mechanism responsible for K transport in the mammalian colon is controversial.
Experiments were performed to determine whether K secretion involves active as well as …

Unidirectional mucosal-to-serosal (Jm leads to s) and serosal-to-mucosal (Js leads to m)
fluxes of potassium and sodium were determined simultaneously on paired sections of …

Fluxes of K from mucosa to serosa or serosa to mucosa have been examined in stripped
preparations of rabbit proximal and distal colon in vitro under short-circuit conditions in …

1. Methods for studying the kinetics of movement of radioactive tracers across human distal
colonic epithelium have been developed for use in vivo and applied to examination of trans …