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secondmedicalop
STEMGeeks
Sunday, March 22, 2020 2:04 AM
Renal Tubular Transport #22. S1 Segment, Proximal Tubule. Organic Cation Transport 1
This post is showing the transport of organic cations. In the basolateral membrane: The Na/K ATPase, which brings 2 potassium ions into the cell and releases 3 sodium ions into the interstitial space.
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secondmedicalop
STEMGeeks
Wednesday, March 18, 2020 5:19 AM
Renal Tubular Transport #21. S1 Segment, Proximal Tubule. Urea Transport 1
This post is showing the urea transport in the S1 segment of the proximal tubule. 50% of the filtered urea is reabsorbed in the proximal tubule. the mechanism of the reabsorption at this level is solvent
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secondmedicalop
STEMGeeks
Friday, March 13, 2020 4:29 AM
Renal Tubular Transport #20. S1 Segment, Proximal Tubule. Uric Acid Transport 1
This post is showing the uric acid transport in the S1 segment of the proximal tubule. This part of the tubule is mainly reabsorbtive In the basolateral membrane, GLUT9 is in charge of releasing the urate
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secondmedicalop
STEMGeeks
Friday, March 6, 2020 5:04 AM
Renal Tubular Transport #19. S1 Segment, Proximal Tubule. Anionic Amino Acid Transport 1
This post is showing the anionic (acidic) aminoacid (aspartate, glutamate) transport. In the basolateral membrane: The Na/K ATPase, which brings 2 potassium ions into the cell and releases 3 sodium ions
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secondmedicalop
STEMGeeks
Monday, March 2, 2020 3:06 AM
Renal Tubular Transport #18. S1 Segment, Proximal Tubule. Cationic Amino Acid Transport 1
This post is showing the cationic (basic) aminoacid (histidine, lysine, arginine) transport. In the basolateral membrane: The Na/K ATPase, which brings 2 potassium ions into the cell and releases 3 sodium
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secondmedicalop
STEMGeeks
Saturday, February 22, 2020 6:11 AM
Renal Tubular Transport #17. S1 Segment, Proximal Tubule. Neutral Amino Acid Transport 1
This post is showing the neutral aminoacid transport. In the basolateral membrane: The Na/K ATPase, which brings 2 potassium ions into the cell and releases 3 sodium ions into the interstitial space. The
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secondmedicalop
STEMGeeks
Monday, February 10, 2020 4:47 AM
Renal Tubular Transport #16. S1 Segment, Proximal Tubule. Organic Anion Transport 1
This post is showing the organic anion transport. The Na/K ATPase, which brings 2 potassium ions into the cell and releases 3 sodium ions into the interstitial space. The sodium/dicarboxylate cotransporter
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secondmedicalop
STEMGeeks
Tuesday, February 4, 2020 4:22 AM
Renal Tubular Transport #15. S1 Segment, Proximal Tubule. Phosphate Transport 1
Here, we show the following in the apical membrane of the S1 segment of the proximal tubule. The NaPi-IIa cotransporter, which brings 3 sodium ions with 1 HPO42- The NaPi-IIc cotransporter, which brings
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secondmedicalop
STEMGeeks
Sunday, February 2, 2020 5:28 AM
Renal Tubular Transport #14. S1 Segment, Proximal Tubule. Glucose Transport 1
In this post, I show that the glucose reabsorption in the S1 segment of the proximal tubule occurs when glucose enters the S1 tubular cell from the fltrate via the SLGT2 (sodium/glucose cotransporter).
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secondmedicalop
STEMGeeks
Monday, January 27, 2020 3:42 AM
Renal Tubular Transport #13. S1 Segment, Proximal Tubule. Magnesium Transport 1
In this post, I show that the magnesium reabsorption in the S1 segment of the proximal tubule is achieved through the paracellular way, by solvent drag and by the positive voltage created in the luminal
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secondmedicalop
STEMGeeks
Sunday, January 26, 2020 2:05 AM
Renal Tubular Transport #12. S1 Segment, Proximal Tubule. Water Transport
In this post, I show that the water reabsorption is achieved through the aquaporin-1 (AQP1) channel in the S1 segment. This channel is present in the apical and basolateral membranes. AQP7 is present in
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secondmedicalop
STEMGeeks
Saturday, January 25, 2020 6:06 AM
Renal Tubular Transport #11. S1 Segment, Proximal Tubule. Calcium Transport 1 (Paracellular Transport)
Here, I show the paracellular movement of calcium in the proximal tubule. Up to 65% of the calcium is reabsorbed at this level. The paracellular (around the cells) movement of calcium could be through
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secondmedicalop
STEMGeeks
Friday, January 24, 2020 4:57 AM
Renal Tubular Transport #10. S1 Segment, Proximal Tubule. Potassium Transport 2 (Paracellular Transport)
Here, I show the paracellular movement of potassium in the proximal tubule. Up to 65% of the potassium is reabsorbed at this level. The paracellular movement of potassium could be through solvent drag
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secondmedicalop
STEMGeeks
Wednesday, January 22, 2020 5:31 AM
Renal Tubular Transport #9. S1 Segment, Proximal Tubule. Potassium Transport 1 (Channels)
Here, I show the different types of potassium channels that exist in a proximal tubular cell, based on their conductance and in their apical or basolateral locations. I am also showing the Na+/K+ ATPase,
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secondmedicalop
STEMGeeks
Sunday, January 19, 2020 12:41 AM
Renal Tubular Transport #2. S1 Segment, Proximal Tubule. Sodium Transport 2 (Sodium/Phosphate Transport) (2nd Edition)
This is the second edition of the Renal Tubular Transport #2. S1 Segment, Proximal Tubule. Sodium Transport 2 (Sodium/Phosphate Transport) Click here for the 1st Edition. I have improved the number of
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secondmedicalop
STEMGeeks
Friday, January 17, 2020 4:33 AM
Renal Tubular Transport #8. S1 Segment, Proximal Tubule. Sodium Transport 8 (Sodium/Amino Acid Transport)
Most of amino acid reabsorption occurs in the proximal tubule. Amino acids are divided into basic (cationic), neutral, and acidic (anionic). The sodium coupled transporters are mentioned in this post and
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secondmedicalop
STEMGeeks
Thursday, January 16, 2020 3:15 AM
Renal Tubular Transport #7. S1 Segment, Proximal Tubule. Sodium Transport 7 (Sodium/Glucose Transport)
As we I have said before, from all the filtered sodium, about 65% is reabsorbed in the proximal tubule. The engine of this is the Na/K ATPase at the basolateral membrane of the tubular cell. This is an
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secondmedicalop
STEMGeeks
Wednesday, January 15, 2020 1:28 AM
Renal Tubular Transport #6. S1 Segment, Proximal Tubule. Sodium Transport 6 (Sodium/Lactate Transport)
This post is showing the sodium transport coupled with the transport of the lactate ion in the apical membrane of the S1 segment of the proximal tubule. Monocarboxylates like L-lactate, propionate, butyrate,
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secondmedicalop
STEMGeeks
Tuesday, January 14, 2020 3:12 AM
Renal Tubular Transport #5. S1 Segment, Proximal Tubule. Sodium Transport 5 (Sodium/Sulfate Transport)
This post is showing the sodium transport coupled with the transport of the sulfate ion in the apical membrane of the S1 segment of the proximal tubule. The Na/K ATPase, which brings 2 potassium ions into
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secondmedicalop
health
Monday, January 13, 2020 3:34 AM
Renal Tubular Transport #4. S1 Segment, Proximal Tubule. Sodium Transport 4 (Sodium/Dicarboxylate Transport)
This post is showing the sodium transport coupled with the transport of dicarboxylates in the apical and basolateral membranes of the S1 segment of the proximal tubule. The Na/K ATPase, which brings 2
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