This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following peptides are not produced by the renal system? 
Select and explain. 
A. Renin, B. Angiotensin I, C. Erythropoietin, D. 1,25DHCC
B: Angiotensin I
Answer: B: Angiotensin I 
Explanation: The hormones produced in the kidneys are 1,25 Dihyrocholecalciferol, Renin and Erythropoetin. Angiotensin is an oligopeptide and is a hormone and a powerful dipsogen. It is derived from the precursor molecule angiotensinogen, a serum globulin produced in the liver. It plays an impoant role in the renin-angiotensin system. Ref: The Local Cardiac Renin-Angiotensin Aldosterone System By Edward D. Frohlich, Richard N. ; Ganong's Review of Medical Physiology, 22nd Edition, Pages 455, 459