... temperature. Absorption Acclimation Adaptation Assay Ion transport Rectum Renal system Temperature Maintenance of a relatively stable extracellular environment is essential for cell function and ultimately survival of most animals ( Bernard, 1872 ). The concentrations of major ions...

... in the activity of basolateral Na + /K + -ATPase (NKA) and apical V-type H + -ATPase (VA) and (2) region-specific Na + and K + flux rates. Both indicate a prominent role for the hindgut (rectum) in K + reabsorption. MTs also exhibit region-specific differences in Na + and K + flux rates that are coupled...

... Intracellular fluid Volume expansion Volume contraction Isosmotic Hyperosmotic challenge Hypo-osmotic challenge Solute/volume plots Correction Compensation Gut Malpighian tubules Rectum Anal papillae In general, total body water in multicellular organisms makes up 70% of the body weight...

... and/or plant feeders, the entrance and exit of water is primarily executed along the alimentary tract, where the hindgut, particularly the rectum, is the major site of water conservation. A cDNA encoding the homologue of the water-specific Drosophila AQP [ Drosophila integral protein (DRIP)] was identified...

... and NaCl uptake in dilute, acidic media. * Author for correspondence (e-mail: [email protected] ) 27 9 2007 © The Company of Biologists Limited 2007 2007 hemolymph pH pH homeostasis Malpighian tubules rectum mitochondrial density mosquito larva Aedes aegypti...

... reveals a unique protein distribution pattern that includes the ectoperitrophic fluid,`transitional region' of the alimentary canal, Malpighian tubules and a subset of cells in the dorsal anterior region of the rectum. Localization of this CA within the lumen of the alimentary canal may be a key to larval...

... rapid than the response of the ileum and rectum to hindgut stimulants. Taken together, these data suggest that, in the initial phase of post-prandial diuresis, urine flow will exceed fluid uptake in the hindgut, thereby allowing excess water to be eliminated. References Audsley , N. , Coast...

...Jeffrey H. Spring; Sulayma A. Albarwani ABSTRACT We describe an in vitro perfused preparation of Acheta domesticus rectum which allows direct comparison of Malpighian tubule secretion and rectal absorption under identical conditions. Rectal absorption is stimulated four-to sixfold by corpora...

... hindgut, acid secretion ( J H ) into the lumen equals alkaline movement ( J OH ) to the haemocoel side, and J H is similar under both open- and short-circuit conditions. J H is similar (1.5 μ equiv cm _2 h _1 ) in recta and ilea. Addition of cyclic AMP inhibits J H across the rectum by 42–66 %, but has...

... is achieved by adjusting the amounts of water lost with the faeces. The rectum is shown to be the principal site of water reabsorption from the faeces. The rate of rectal water absorption is shown to vary with the water content of the food and thus according to need. Water reabsorbed from the rectal contents...