<prompt> Heparin is the commonly used anticoagulant in cardiac surgery.All of the following are true about heparin EXCEPT:Weakest acid found in living beingMost commercial preparations of heparin are derived from pig intestineActs antithrombin activationProduce thrombocytopenia  <response>: Heparin is the strongest acid in the body. All the other statements about heparin are true. From medical pharmacology padmaja 4th edition Page no 334 