Angiotensinogen is a protein produced and secreted by:
Angiotensinogen is a protein produced and secreted by:
juxtaglomerular (JG) cells
macula densa cells
endothelial cells (cells lining the blood vessels)
liver cells
Solution
Angiotensinogen is produced in the liver and is found continuously circulating in the plasma. Renin then acts to cleave angiotensinogen into angiotensin $\mathrm{I}$.