... conditions in their midgut with the underlying epithelial transport mechanisms being largely unknown. Using ion-selective microelectrodes, the present study demonstrated that pluteus larvae of the purple sea urchin have highly alkaline pH (pH ∼9) and low [Na + ] (∼120 mmol l −1 ) in their midgut fluids...

... of nutrients. Mosquito V-ATPase Na + /K + -ATPase Ion-selective microelectrodes Ionoregulation Gastric caecum Aedes aegypti is responsible for the spread of dengue, Zika fever, chikungunya and yellow fever, all of which infect millions of humans every year ( Tolle, 2009 ). The A. aegypti...

... use the scanning ion-selective microelectrode technique to measure efflux and influx of K + , H + , Na + and Ca 2+ in intact worms. Transport of ions into, or out of, immobilized worms produces small gradients in ion concentration in the unstirred layer near the surface of the worm. These gradients...

... μm. * Author for correspondence (e-mail: [email protected] ) 16 3 2009 2009 stereology microperfusion H + V-ATPase carbonic anhydrase ion-selective microelectrodes SIET H + gradients surface pH The insect gut carries out some of the most vital functions...

... a number of physiological adaptations to the short-term and long-term stresses associated with blood feeding. More recent electrophysiological studies using voltage- and ion-selective microelectrodes have extended our understanding of the mechanisms and control of ion transport by the secretory...

...K. A. Collier; M. J. O’donnell ABSTRACT The pH and concentrations of K + and Cl − in the unstirred layer (USL) associated with the basolateral surfaces of the upper and lower Malpighian tubules of Rhodnius prolixus were measured using extracellular ion-selective microelectrodes. When stimulated...

... that would allow K + secreted into the goblet cavity to exit to the gut lumen, while preventing H + from exiting, remain unclear. © 1992 by Company of Biologists 1992 tobacco homworm Manduca sexta ion-selective microelectrodes active potassium transport intracellular pH intracellular...

...Andrew Barber; Gerrit Ten Bruggencate * Address for reprints: Abteilung Pharmakologie, E. Merck AG, Frankfurter Strasse 250, 6100 Darmstadt 1, West Germany. 20 3 1985 © 1985 by Company of Biologists 1985 Salivary glands acetylcholine ion-selective microelectrodes...