Multiple choice

Which among the following statements regarding haemostasis is not true?

  1. Platelet activation stimulates production of thromboxane A2 (TXA2) by cyclooxygenase (COX).

  2. Aggregation of platelets is stimulated by ADP via P2Y receptors.

  3. Primary haemostasis initially involves vasodailation.

  4. Fibrin is broken down by plasmin.

  5. Binding of thrombin to thrombomodulin prevents cleavage of fibrinogen.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Primary haemostasis initially involves vasoconstriction in response to vascular damage which limits blood loss, and platelet adhesion and activation due to exposure and binding to subendothelial matrix.

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