<prompt> Heparin acts as an anticoagulant by:-Activating antithrombin IIIInactivating antithrombin IIIActivating thrombinActivating factor Xa  <response>: Heparin acts an anticoagulant by activating antithrombin III and thus inactivating thrombin and factor Xa. Heparin displaces lipoprotein lipase enzyme from the endothelial wall. Other glycosaminoglycans uses are: Danaparoid is an anticoagulant. 