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Human Physiology

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Multiple Choice

Which of the following is INCORRECT regarding blood coagulation in human beings?

  1. Clotting is initiated by exposure of tissue factor-bearing cells to plasma clotting factors.
  2. Fibrin monomers get cross-linked by factor XIIIa.
  3. Platelet activation stimulates production of thromboxane.
  4. Primary haemostasis initially involves vasodailation.
  5. Platelets are the fragments of megakaryocytes.