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Renal Tubular Transport #6. S1 Segment, Proximal Tubule. Sodium Transport 6 (Sodium/Lactate Transport) by secondmedicalop

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· @secondmedicalop · (edited)
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Renal Tubular Transport #6. S1 Segment, Proximal Tubule. Sodium Transport 6 (Sodium/Lactate Transport)
![Picture Steemit Renal Tubular Transport.jpg](https://cdn.steemitimages.com/DQmdchs2tyTZHCR8g4wJZaCuMBa1dAr3ysQnbKhZo3gy4ED/Picture%20Steemit%20Renal%20Tubular%20Transport.jpg)

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, or nicotinate can be cotransported with sodium

- The Na/K ATPase, which brings 2 potassium ions into the cell and releases 3 sodium ions into the interstitial space. 
- The sodium/lactate cotransporter (SMCT2) at the apical membrane, which brings in 2 sodium ions from the filtrate together with 1 lactate ion.

This will be shown again in a future post when urate transport is reviewed. It will also be reviewed when SMCT1 is shown in the S3 segment of the proximal tubule

![Picture Steemit Tubular Cell Sodium Transport 6.jpg](https://cdn.steemitimages.com/DQmWg1QX4f7EzaN34r3XnVfqoDT2tM9duodtD4tcpUumN6J/Picture%20Steemit%20Tubular%20Cell%20Sodium%20Transport%206.jpg)

#
##### **Previous Posts in this Series**

###### [Renal Tubular Transport #1. S1 Segment, Proximal Tubule. Sodium Transport 1](https://stemgeeks.net/hive-163521/@secondmedicalop/renal-tubular-transport-1-s1-segment-proximal-tubule-sodium-transport-1)
###### [Renal Tubular Transport #2. S1 Segment, Proximal Tubule. Sodium Transport 2](https://stemgeeks.net/hive-163521/@secondmedicalop/renal-tubular-transport-1-s1-segment-proximal-tubule-sodium-transport-2)
###### [Renal Tubular Transport #3. S1 Segment, Proximal Tubule. Sodium Transport 3](https://stemgeeks.net/health/@secondmedicalop/renal-tubular-transport-3-s1-segment-proximal-tubule-sodium-transport-3)
###### [Renal Tubular Transport #4. S1 Segment, Proximal Tubule. Sodium Transport 4](https://stemgeeks.net/health/@secondmedicalop/renal-tubular-transport-4-s1-segment-proximal-tubule-sodium-transport-4)
###### [Renal Tubular Transport #5. S1 Segment, Proximal Tubule. Sodium Transport 5](https://stemgeeks.net/health/@secondmedicalop/renal-tubular-transport-5-s1-segment-proximal-tubule-sodium-transport-5-sodium-sulfate-transport)
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