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Serum is______________?
  • (A)  Plasma- clotting factors
  • (B)  Plasma- fibrin
  • (C)  Blood – RBC
  • (D)  Blood – all cellular elements
For heparin which of the following is ?
  • (A)  Inhibits conversion of fibrinogen to insoluble fibrin
  • (B)  Interferes with action of thrombin
  • (C)  Is released by macrophages
  • (D)  Is released by mast cells