A) macula densa cells
B) endothelial cells (cells lining the blood vessels)
C) liver cells
D) juxtaglomerular (JG) cells
Correct Answer: C
Solution :
Angiotensinogen is a plasma protein produced and secreted by the liver cells. Renin secreted from juxtaglomerular cells and acts enzymatically on angiotensinogen to release 10 amino acid peptide angiotensin \[\text{I}\]. Macula densa is actually a plaque in wall at the end of thick ascending limb of nephrons.
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