What are the main sites of reabsorption in the kidney?
What are the main sites of reabsorption in the kidney?
Reabsorption of water and specific solutes occurs to varying degrees over the entire length of the renal tubule. Bulk reabsorption, which is not under hormonal control, occurs largely in the proximal tubule. Over 70% the filtrate is reabsorbed here.
What is the site of absorption in nephron?
The proximal nephron absorbs about two-thirds of filtered sodium, without dissociating salt and water absorption. The thick ascending limb absorbs 25% of filtered Na+, but no water. The distal nephron absorbs 10% of filtered Na+ in close relation with K+ and, to some extent, H+ secretion.
What are the two main routes for reabsorption?
There are two routes through which reabsorption can take place: paracellular and transcellular. The transcellular route transports solutes through a cell. The paracellular route transports solutes between cells, through the intercellular space.
Where does reabsorption take place?
Most of the reabsorption of solutes necessary for normal body function such as amino acids, glucose, and salts takes place in the proximal part of the tubule.
Where does most of the reabsorption and secretion occur?
This reabsorption occurs in the PCT, loop of Henle, DCT, and the collecting ducts while the majority of secretion occurs in the PCT and DCT (Table 25.5 and Figure 25.5. 1). Various portions of the nephron differ in their capacity to reabsorb water and specific solutes.
Where is most of the water reabsorbed in the kidney?
proximal tubule
The majority of water reabsorption that occurs in the nephron is facilitated by the AQPs. Most of the fluid that is filtered at the glomerulus is then reabsorbed in the proximal tubule and the descending limb of the loop of Henle.
What is absorbed in the glomerulus?
The filtrate absorbed in the glomerulus flows through the renal tubule, where nutrients and water are reabsorbed into capillaries. At the same time, waste ions and hydrogen ions pass from the capillaries into the renal tubule. This process is called secretion.
Where does reabsorption occur in the nephron quizlet?
Reabsorption occurs from the filtrate across the tubular lumen of the nephron and into the blood of the peritubular capillaries.
In which part of the nephron does most reabsorption occur?
The part of a nephron in which most reabsorption occurs is (b) proximal convoluted tubule.
What is the primary site of tubular reabsorption?
Rio Salado A & P Chapt Urinary Flash
| Question | Answer |
|---|---|
| site of filtration formation = | glomerulus |
| primary site of tubular reabsorption = | proximal convoluted tubule |
| secondarily important site of tubular reabsorption = | distal convoluted tubule |
| structure that conveys the processed filtrate (urine) to the renal pelvis = | collecting duct |
In what part of the nephron does most absorption and secretion occur quizlet?
Secretion occurs in the proximal convoluted tubule, the nephron loop, and the collecting duct.
What is reabsorbed in the distal convoluted tubule?
4.2 Distal convoluted tubule The distal convoluted tubules (DCT) is the last passage of magnesium reabsorption in the nephrons, as no further reabsorption occurs beyond this segment. Of the total magnesium reabsorption 10% takes place in the DCT (Brunette, Vigneault, & Carriere, 1974).