A biopsy is a medical test commonly performed by a surgeon, interventional radiologist, or an interventional cardiologist involving extraction of sample cells or tissues for examination to determine the presence or extent of a disease. The tissue is generally examined under a microscope by a pathologist, and can also be analyzed chemically.
in fibrin. ...from fibrinogen, a soluble protein that is produced by the liver and found in blood plasma. When tissue damage results in bleeding, fibrinogen is converted at the wound into fibrin by the action of thrombin, a clotting enzyme.
Trade Names. Pharmacology. Thrombin activates platelets and catalyzes the conversion of fibrinogen to fibrin, which are the steps that are essential for blood clot formation. The fibrin clot is stabilized by cross-linking that occurs as a result of activation of the patient's endogenous factor XIII, which requires the presence of calcium.