The Electrical Characteristics of Active Sodium Transport in the Toad Bladder
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منابع مشابه
The Electrical Characteristics of Active Sodium Transport in the Toad Bladder
The mechanism responsible for active sodium transport in the urinary bladder of the toad appears to be located at the serosal boundary of the epithelial cell layer of the bladder. Studies of the potential step observed at the serosal boundary in the open-circuited state were undertaken in an attempt to define the factors responsible for its production. Glass micropipettes were used to measure t...
متن کاملActive Sodium Transport by the Isolated Toad Bladder
Studies were made of the active ion transport by the isolated urinary bladder of the European toad, Bufo bufo, and the large American toad, Bufo marinus. The urinary bladder of the toad is a thin membrane consisting of a single layer of mucosal cells supported on a small amount of connective tissue. The bladder exhibits a characteristic transmembrane potential with the serosal surface electrica...
متن کاملRespiration and active sodium transport of isolated toad bladder.
Preparation of Tissue-Studies were performed on the isolated urinary bladder of the toad, Bujo marinus. Animals were pithed and the two halves of the bladder rapidly removed through a ventral incision. The tissue was rinsed in Ringer’s solution before use. For the study of the oxygen consumption of various toad tissues, small intestine, stomach, heart, ventral abdominal skin, and skeletal muscl...
متن کاملThe Kinetics of Sodium Transport in the Toad Bladder
In the accompanying paper, a compartmental model for the toad bladder sodium transport system was developed. In the present paper, the model is tested by determining the effects of antidiuretic hormone on the pools and fluxes. It is shown that this hormone affects only that sodium pool previously designated as the transport pool, and that the effects are on two separate sites. In the first plac...
متن کاملThe Role of Potassium in Active Transport of Sodium by the Toad Bladder
Studies were carried out on the isolated urinary bladder of the toad, Bufo marinus, in order to explain the dependence of active sodium transport on the presence of potassium, in the serosal medium. Attempts to obtain evidence for coupled sodium-potassium transport by the serosal pump were unsuccessful; no relation between sodium transport and uptake of K(42) from the serosal medium was demonst...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1963
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.46.3.491