Question

Choose the correct answer from the alternatives given.
Which of the following ions is involved in blood clotting?

• A. $K^{+}$
• B. $N{a}^{+}$
• C. $F{e}^{+++}$
• D. $C{a}^{++}$

Answer 1

The correct option is D $C{a}^{++}$

Blood coagulation is a complex biochemical process involving platelets and many proteins (enzymes). Calcium is involved at several steps in the blood clotting, including the activation of the platelets, activation of clotting factors and enzymes which are present in the blood in inactive form. The $C{a}^{++}$ ions bind with prothrombin and covert it into active form thrombin. The thrombin in turn converts fibrinogen into fibrin (a thread like protein) which traps red blood cells and helps in the formation of clot.

So, the correct option is '$C{a}^{++}$'.