what is the difference between rennin and renin

 
Rennin Renin
Rennin is an enzyme secreted by gastric glands. Renin is a hormone secreted by kidneys.
It digests protein caseinogen present in milk into solid casein. It is produced by juxtaglomerular cells of kidney when blood pressure falls. It converts angiotensinogen in blood to angiotensin I and further to angiotensin II. Angiotensin II, being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.

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