Which of the following blood cells play an important role in the blood clotting mechanism?

• Thrombocytes

• Erythrocytes

• Leucocytes

Platelets group together and release a complex enzyme X. What is X?

• prothrombin

• thrombin

• fibrinogen

• thrombokinase

Thrombokinase together with calcium ion and vitamin K convers P to Q.

• P: prothrombin Q: thrombin

• P: thrombin Q: prothrombin

• P: fibrinogen Q fibrin

• P: fibrin Q: fibrinogen

Thrombin, in turn, catalyzes the conversion of the soluble protein fibrin to fibrinogen, which serves as a net that traps blood cells

• True

• False

Haemophilia is a disease associated with blood clotting in which there is a clot formation inside an unbroken blood vessel

• True

• False

A blood clot moving in the bloodstream is called an embolus

• True

• False

Blockage in carotid arteries may lead to a heart attack while blockage in the coronary arteries may lead to stroke

• True

• False