Henle's physiology
Henle's bore (from the name of German physiologist Friedrich Gustav Jakob Henle) or nephron's anus is an anatomical element from the characteristic U-shaped, interposed between the proximal tubule and the distal tubule with which it forms the kidney tubule. The handle divides into a descending portion, an ascending stasen portion, and a thick ascending portion. The descending portion is dependent on the water absorption and is therefore permeable to water. The ascending portion is water-repellent and soluble in solids absorption. In the ascending portion, Na / K / 2Cl is present on the tubular cells, using the gradient created within the cell by the Na / K ATP-asi carries the ions first within the cell and subsequently in the interstitium. This results in an increase in interstitial osmolarity, which results in a reabsorption of water from the descending (permeable) but not ascending (waterproof) stretch of water. Henle's bush in the juxtamidollar nefrons receives an isosmotic fluid from the proximal contorted tubule and in the descending tract creates an osmotic gradient determined by the reabsorption of water not followed by solutes such as to determine a hyperosmotic fluid in the conjunction between descending and ascending. Subsequently, the absorption of solutes into the ascending tract not followed by water will bring the fluid that reaches the distal twisted tube to be even hypoxic. This mechanism is called countercurrent multiplier. The ADH hormone causes an increase in urea within the interstitial because of a greater permeability of the duct collector to this substance. This results in an increase in interstitial osmoticity such as to result in further absorption of water from the downward tract. This will produce more concentrated urine. This mechanism is at the basis of the urine concentration mechanism. Voices correlateemodify wikitesto
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