Increased aldosterone levels results in salt and water absorption in the distal collecting tubule.
2.
Potassium is excreted twice and reabsorbed three times before the urine reaches the collecting tubules.
3.
Through osmotic effects, they also oppose the action of ADH in the collecting tubule.
4.
Physiologically, this works by reducing the responsiveness of the collecting tubule cells to ADH.
5.
Aldosterone initially results in an increase in Na + reabsorption in these patients through stimulation of ENaC channels in principal cells of the renal collecting tubules.
6.
A series of glands lie on the outer surface of the intestine, opening through collecting tubules into the stomach, although their precise function is unclear.
7.
These structures include the vasa rectae ( both spuria and vera ), the venulae rectae, the medullary capillary plexus, the loop of Henle, and the collecting tubule.
8.
Low flow, as in urinary tract obstruction, allows more time for reabsorption and is often associated with increases in antidiuretic hormone ( ADH ), which increases the permeability of the terminal collecting tubule to urea.
9.
Chronic lithium ingestion appears to affect the tubules by entering the collecting tubule cells through sodium channels, accumulating and interfering with the normal response to ADH ( ADH resistance ) in a mechanism that is not yet fully understood.
10.
"' Medullary Sponge Kidney "'( also known as "'Cacchi & ndash; Ricci disease "') is a congenital disorder of the kidneys characterized by cystic dilatation of the collecting tubules in one or both kidneys.
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