Question

The process of blood clotting does not require

• A. Sodium ions
• B. Calcium ions
• C. Prothrombin
• D. Vitamin K
• E. Platelets

Answer 1

The correct option is A Sodium ions

Blood clotting is the process by which blood changes from liquid to gel and stop bleeding. When the blood vessels get injured, platelets in blood produces prothrombin in the presence of vitamin K. The prothrombin then converts into the thrombin (active form) in the presence of thrombokinase and calcium ions. This thrombin then converts fibrinogen (inactive) into the fibrin (active). Fibrin thread then plugs the damaged part and appear like a clot. Thus, the correct answer is option A.