Q:

The role of platelets in blood clotting includes all of the following EXCEPT one. Which one?

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The role of platelets in blood clotting includes all of the following EXCEPT one. Which one?


  1. to form a plug in the hole of the damaged blood vessel
  2. to convert prothrombin to thrombin
  3. to release chemicals to attract other platelets
  4. to adhere to exposed collagen fibres in damaged blood vessels

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B: Prothombinase is the enzyme that converts prothrombin to thrombin (it does not come from platelets).

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