Question

Mark the pair of substances among the following which is essential for coagulation of blood.

• A. Platelet factors and heparin
• B. Calcium ions and platelet factors
• C. Oxalates and citrates
• D. Heparin and calcium ions

Answer 1

The correct option is B

Calcium ions and platelet factors

Heparin and calcium ions

● Heparin is an anticoagulant and prevents blood clotting.

● Calcium ions convert prothrombin into thrombin, which in turn catalyses the conversion of fibrinogen into fibrin.

Calcium ions and platelet factors

● Calcium ions convert prothrombin into thrombin, which in turn catalyses the conversion of fibrinogen into fibrin.

● Platelet factors are released by the platelets in response to injury to the tissue and initiate the clotting process.

Oxalates and citrates

●Oxalates and citrates have anticoagulant activity.

Platelet factors and heparin

● Platelet factors are released by the platelets in response to injury to the tissue and initiate the clotting process.

● Heparin is an anticoagulant and prevents blood clotting.

Final answer

b. Calcium ions and platelet factors