Question

Identify whether the following statements are true/false.

(iv) Blood fails to clot readily in the case of deficiency of calcium.

• A. True
• B. False

Answer 1

The correct option is A True

• The injured tissue cells and platelets disintegrate at the site of injury and release a substance known as thrombokinase or thromboplastin.
  
• The thrombokinase acts as an enzyme which converts prothrombin (inactive) of the plasma into thrombin (active), with the help of calcium ions present in the plasma.
  
• Thus, without calcium, thrombokinase will not be able to convert inactive prothrombin to active thrombin which is the major component to produce the clot.