1. The fluxes of isotopically labelled @entity1372 , @entity972 and @entity2865 passing in each direction across isolated sheets of rumen epithelium from the @entity742 have been measured under short-circuit conditions.2. With both sides of the epithelium bathed in @entity2865 Ringer the mean @entity1372 fluxes were 2.85 mumole/cm(2).hr from rumen to blood and 1.28 mumole/cm(2).hr in the reverse direction. In @entity597 Ringer the @entity1372 fluxes were 1.64 mumole/cm(2).hr from rumen to blood and 0.54 mumole/cm(2).hr from blood to rumen.3. In @entity2865 Ringer the mean @entity972 fluxes were 0.18 mumole/cm(2).hr from rumen to blood and 0.54 mumole/cm(2).hr from blood to rumen. In @entity597 Ringer the @entity972 fluxes were 0.07 mumole/cm(2).hr from rumen to blood and 0.35 mumole/cm(2).hr from blood to rumen.4. In @entity2865 Ringer the mean @entity2865 fluxes were 4.89 mumole/cm(2).hr from rumen to blood and 3.78 mumole/cm(2).hr from blood to rumen.5. In @entity2865 Ringer the mean value of the short-circuit current was 13 muA/cm(2), corresponding to a flux of 0.49 muequiv/cm(2).hr. When @entity597 was substituted for @entity2865 , the short-circuit current was increased by about 40%, and the net flux of @entity1372 from rumen to blood fell by 30%.6. Neither the @entity1372 nor the @entity2865 fluxes changed significantly when the epithelium was temporarily open-circuited.

Ion transport across an isolated preparation of XXXX rumen epithelium.

@entity972 :: ('MESH:D011188', 'Chemical') :: ['potassium'] @entity742 :: ('9940', 'Species') :: ['sheep'] @entity1372 :: ('MESH:D012964', 'Chemical') :: ['sodium'] @entity2865 :: ('CHEBI:17996', 'Chemical') :: ['chloride'] @entity597 :: ('CHEBI:16189', 'Chemical') :: ['sulphate']
@entity742 :: (9940,Species) :: ['sheep']
