Abstract
The extent of diuresis following ingestion of different artificial diets has been used to investigate, in vivo, the mechanism of fluid absorption from the anterior midgut in Rhodnius prolixus. Urine output in the first 3 hr after feeding declined as sodium concentration in the diet was reduced (Na + + K + maintained at 150 mM). The diminished diuresis following low-sodium diets has been explained not as a failure of Malpighian tubule function, since Rhodnius tubules will function in a variety of ionic media, but as a failure of fluid absorption from the crop. The process requires dietary sodium and a Na +-dependent pump in the crop is postulated as the driving force for this movement of water into the haemolymph immediately following a meal.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call