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 the cell and releases 3 sodium ions into the interstitial space.
• The sodium/sulfate cotransporter (NaS1) at the apical membrane, which brings in 3 sodium ions from the filtrate together with 1 sulfate ion.

This will be shown again in a future post when sulfate transport is reviewed

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

Renal Tubular Transport #4. S1 Segment, Proximal Tubule. Sodium Transport 4