This article shows that ATP can be released through the basolateral membrane of the macula densa (MD) cells.
There is a maxi anion channel which is activated by sodium chloride (volume). ATP uses this channel to leave the MD cells into the extracellular mesangium.
ATP then can act in the extracellular mesangium cells and the afferent arteriole (contracting) using the P2Y receptors
Credits
Renal Corpuscle Image. 2019. Downloaded under a Creative Commons Attribution-Share Alike 4.0 International License from Wikimedia Commons. Author: Shypoetess. No changes were made.
Posts in this series
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