what substances can be reabsorbed in the proximal tubule?
482187
The reabsorption in the proximal tubule is isosmotic. In the PCT 65% of water, 100% of glucose, 100% amino acids, 65% of potassium, 65% chloride and 67% of sodium is reabsorbed.
1251009
The substance that remains in the collecting duct of the kidneys following reabsorption is better known as urine. ... Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen and occurs mainly by active transport and passive diffusion.
1133726
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.
23084
Most of the Ca++, Na+, glucose, and amino acids must be reabsorbed by the nephron to maintain homeostatic plasma concentrations. Other substances, such as urea, K+, ammonia (NH3), creatinine, and some drugs are secreted into the filtrate as waste products.
1001399
Secretion , which occurs in the proximal tubule section of the nephron , is responsible for the transport of certain molecules out of the blood and into the urine. Secreted substances include potassium ions, hydrogen ions, and some xenobiotics .
702653
Once the filtrate passes through the thick ascending limb of Henle, it enters the distal convoluted tubule, which is a duct of the renal tubule located in the kidney's cortex that reabsorbs calcium, sodium, and chloride and regulates the pH of urine by secreting protons and absorbing bicarbonate.
137882
Stage 2 - Selective reabsorption Therefore, the kidneys selectively reabsorb only those molecules which the body needs back in the bloodstream. The reabsorbed molecules include: all of the glucose which was originally filtered out. as much water as the body needs to maintain a constant water level in the blood plasma.
796119
As much as 60%–70% of total Na reabsorption takes place along the proximal convoluted tubule (PCT) and proximal straight tubule, and because reabsorption is near isotonic in this part of the nephron, this is also true for the reabsorption of water.
71052
Potassium excretion is also increased by Bumex, in a dose-related fashion. Bumex may have an additional action in the proximal tubule. Since phosphate reabsorption takes place largely in the proximal tubule, phosphaturia during Bumex induced diuresis is indicative of this additional action.
1150355
Antidiuretic hormone binds to receptors on cells in the collecting ducts of the kidney and promotes reabsorption of water back into the circulation. In the absense of antidiuretic hormone, the collecting ducts are virtually impermiable to water, and it flows out as urine.
539604
Selective reabsorbtion occurs in the PCT (proximal convoluted tubule). The PCT is highly permeable meaning it is easy for molecules to diffuse through it.
1301223
['The Glomerulus Filters Water and Other Substances from the Bloodstream. ... ', 'The Filtration Membrane Keeps Blood Cells and Large Proteins in the Bloodstream. ... ', 'Reabsorption Moves Nutrients and Water Back into the Bloodstream.']
676109
It is generally thought that thiazides are ineffective in patients with more advanced CKD because of more proximal sodium reabsorption in the nephron. This results in less sodium being delivered to the distal tubule and therefore less thiazide diuretic action in the distal tubule.
1107423
With up to 180 liters per day passing through the nephrons of the kidney, it is quite obvious that most of that fluid and its contents must be reabsorbed. That recovery occurs in the PCT, loop of Henle, DCT, and the collecting ducts (Table 5 and Figure 1).
943232
['Urea 9.3 g/L.', 'Chloride 1.87 g/L.', 'Sodium 1.17 g/L.', 'Potassium 0.750 g/L.', 'Creatinine 0.670 g/L.', 'Other dissolved ions, inorganic and organic compounds (proteins, hormones, metabolites).']
1024713
Renal tubular epithelial (RTE) cells line the renal tubules. ... Increased numbers of proximal and distal convoluted RTE cells are seen in cases of acute tubular necrosis and certain drug or heavy metal intoxication. Oval fat bodies are RTE cells that have absorbed lipids in the urinary filtrate.
959993
Glucose: Glucose will be present in blood plasma and glomerular filtrate, but not present in urine (normally) This is because the glucose is selectively reabsorbed in the proximal convoluted tubule. It is reabsorbed from the filtrate into the blood by active transport (symport with Na+ ions)