The effect of carbohydrates on the intestinal potentials of Cryptochiton stelleri.
J Physiol
; 225(3): 515-27, 1972 Sep.
Article
en En
| MEDLINE
| ID: mdl-5076385
1. The effect of various monosaccharides on the potential difference across the intestine of the invertebrate, Cryptochiton stelleri, was studied using an everted sac technique.2. D-Glucose, when present in the mucosal solution, increased the transmural potential across the anterior intestine but had no effect on electrical potentials across the posterior intestine.3. D-Galactose, when present in the mucosal solution, increased the transmural potential across the posterior intestine but had no effect on electrical potentials across the anterior intestine.4. D-Fructose and D-mannose, metabolizable but non-transported sugars, increased anterior intestinal potentials but not posterior intestinal potentials.5. 3-O-methylglucose, an actively transported (across the anterior intestine) but non-metabolizable sugar, did not alter potentials across either the anterior or posterior intestine.6. The addition of D-glucose to the serosal solution increased anterior intestinal potentials, but the serosal addition of D-galactose did not affect posterior intestinal potentials.7. NaF, phlorizin and anoxia prevented the increase in potential across the anterior intestine and phlorizin (10(-4) but not 10(-6)M) and NaF but not anoxia prevented the increase in potential across the posterior intestine.8. It was suggested that the effect of glucose on anterior intestinal potentials was a metabolic effect, whereas the effect of galactose on posterior intestinal potentials was related to the active transport of that sugar from mucosa to serosa.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fenómenos Fisiológicos del Sistema Digestivo
/
Potenciales de la Membrana
/
Moluscos
/
Monosacáridos
Límite:
Animals
Idioma:
En
Revista:
J Physiol
Año:
1972
Tipo del documento:
Article
Pais de publicación:
Reino Unido