What is the function of the descending limb of the nephron loop?
Its primary role is to concentrate the salt in the interstitium, the tissue surrounding the loop. Its descending limb is permeable to water but completely impermeable to salt, and thus only indirectly contributes to the concentration of the interstitium.
What happens with water in the descending limb of the loop of Henle?
Thin Descending Limb The descending limb is highly permeable to water, with reabsorption occurring passively via aquaporin-1 (AQP1) channels. Very low amounts of urea, sodium (Na+) and other ions are also reabsorbed.
What is the difference between ascending and descending loop of Henle?
The key difference between ascending and descending loop of Henle is that ascending loop of Henle is the thicker segment of the loop of Henle located just after the sharp bend of the loop while descending loop of Henle is the thinner segment located just before the sharp bend of the loop.
What occurs in the descending limb of the loop of Henle quizlet?
The loop of henle dips down into the medulla, which is highly salty because of the ion absorption, Sodium is constantly being pumped out of the ascending limb into the medulla. The ascending limb is impermeable to water. The descending limb is permeable to water, but has low permeability to Sodium.
Where is the descending limb of the loop of Henle?
Within the nephron of the kidney, the descending limb of loop of Henle is the portion of the renal tubule constituting the first part of the loop of Henle. Scheme of renal tubule and its vascular supply. (Labeled at center left.)
Why does water move out of the descending limb?
In summary, the loop of Henle is surrounded by tissue fluid which has a high concentration of ions in it. This causes water to move out of the descending limb by osmosis. Because of this concentration gradient ions move into the loop in the thin ascending limb.
Does descending limb of the loop of Henle reabsorb water?
The descending portion of the loop of Henle is extremely permeable to water and is less permeable to ions, therefore water is easily reabsorbed here and solutes are not readily reabsorbed.
Is descending loop of Henle permeable to water?
What happens with water in the descending limb of the loop of Henle quizlet?
The descending limb is permeable to water, but has low permeability to Sodium. As the filtrate travels down the descending limb the water leaves by osmosis because of the salty environment into the medulla.
What products are reabsorbed in the descending loop of Henle?
The liquid entering the loop of Henle is the solution of salt, urea, and other substances passed along by the proximal convoluted tubule, from which most of the dissolved components needed by the body—particularly glucose, amino acids, and sodium bicarbonate—have been reabsorbed into the blood.