This article states that the AT1 receptor mediates vasoconstriction in the afferent and efferent arterioles.
This is done by signaling using Gq/11-protein and protein kinase C activation.
Angiotensin II causes constriction of the afferent arteriole by increasing calcium entry via voltage-sensitive, L-type channels, whereas the angiotensin II effects on the efferent arteriole are caused by calcium release from intracellular stores and calcium entry through voltage-independent calcium entry channels.
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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.
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