Question

Blood clotting requires

• A. Na${}^{+}$ and K${}^{+}$
• B. Na${}^{+}$ and prothrombin
• C. Ca${}^{2+}$ and thromboplastin
  
• D. None of the above

Answer 1

The correct option is C Ca${}^{2+}$ and thromboplastin

$C{a}^{++}$ and thromboplastin are needed for blood clotting. Coagulation (thrombogenesis) is the process by which blood forms clots. The process of clotting starts by the release of thromboplastin by the platelets and resquires calcium ions.