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The circulatory system — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyThe circulatory system1 Mark
MCQ
Thrombocytes help in blood clotting by producing
  • A
    Thrombokinase
  • B
    Stuart factor
  • C
    Thromboplastin
  • ✓
    All of these
✓

Answer

Correct option: D.
All of these
(d) All of these
Explanation :
When blood vessel is cut, clotting of blood occurs with the help of enzyme named as thrombokinase or thromboplastin which covert inactive prothrombin of the plasma into active thrombin. The blood inside the blood vessels does not clot because there is no free thromboplastin available to convert into active prothrombin into active thrombin.

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