Renal Tubular Transport #4. S1 Segment, Proximal Tubule. Sodium Transport 4 (Sodium/Dicarboxylate Transport)

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Picture Steemit Renal Tubular Transport.jpg

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 potassium ions into the cell and releases 3 sodium ions into the interstitial space.
  • The sodium/dicarboxylate cotransporter (NaDC1) at the apical membrane, which brings in 3 sodium ions from the filtrate together with 1 dicarboxylate ion which could be citrate, α keto-glutarate or succinate.
  • The sodium/dicarboxylate cotransporter (NaDC3) at the basolateral membrane, which brings in 3 sodium ions from the interstitium and brings in mainly α keto-glutarate. This transporter is important for the organic anion transport which will be shown at a later post

Picture Steemit Tubular Cell Sodium 4.jpg

Previous Posts in this Series
Renal Tubular Transport #1. S1 Segment, Proximal Tubule. Sodium Transport 1
Renal Tubular Transport #2. S1 Segment, Proximal Tubule. Sodium Transport 2
Renal Tubular Transport #3. S1 Segment, Proximal Tubule. Sodium Transport 3

#renaltubuleproject



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