AP BIOLOGY

Detailed explanation-1: -Prothrombin is a plasma protein which is converted into thrombin in the presence of thromboplastin released by platelets at the site of injury. The thrombin then converts protein fibrinogen into insoluble fibrin and thus aids in blood clotting.

Detailed explanation-2: -Prothrombin is a protein produced by your liver. It is one of many factors in your blood that help it to clot appropriately.

Detailed explanation-3: -Prothrombin is a protein of molecular mass about 68, 000. It is an -globulin and present in the plasma at a concentration of 300 Iowa units/ml or 15 g/ml. It is converted to the active enzyme thrombin by the action of several factors known as plasma or tissue thromboplastins (Fig. 1).

Detailed explanation-4: -Prothrombin is a protein made by the liver. Prothrombin helps blood to clot. The “prothrombin time” (PT) is one way of measuring how long it takes blood to form a clot, and it is measured in seconds (such as 13.2 seconds). A normal PT indicates that a normal amount of blood-clotting protein is available.

Detailed explanation-5: -prothrombin, glycoprotein (carbohydrate-protein compound) occurring in blood plasma and an essential component of the blood-clotting mechanism.