Which is not synthesized by the vascular epithelium?: (A) Prostacyclin, (B) Angiotensin 2, (C) Endothelin, (D) Heparin
Answer is B. Endothelial cells constitute a large and impoant tissue. They secrete many growth factors and vasoactive substances. The vasoactive substances include prostaglandins and thromboxanes, nitric oxide, and endothelins.Lungs activate angiotensin I to angiotensin II; this reaction is paicularly prominent in the lungsRef: Ganong's Review of Medical Physiology;23rd edition; Page No: 606