What is the primary plasminogen activator?

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Multiple Choice

What is the primary plasminogen activator?

Activating plasminogen to plasmin is the essential step in fibrinolysis, and the main endogenous activator of this process is tissue-type plasminogen activator. tPA is released by endothelial cells and is especially potent when attached to fibrin in a clot, where it converts plasminogen to plasmin to digest the fibrin matrix and dissolve the clot. Urokinase can also activate plasminogen but is not the primary, clot-specific activator in normal physiology. Plasmin is the active enzyme that degrades fibrin, not the activator, and thrombin is a coagulation protease that promotes clot formation rather than fibrinolysis. Therefore, tissue plasminogen activator is the best answer.

Activating plasminogen to plasmin is the essential step in fibrinolysis, and the main endogenous activator of this process is tissue-type plasminogen activator. tPA is released by endothelial cells and is especially potent when attached to fibrin in a clot, where it converts plasminogen to plasmin to digest the fibrin matrix and dissolve the clot. Urokinase can also activate plasminogen but is not the primary, clot-specific activator in normal physiology. Plasmin is the active enzyme that degrades fibrin, not the activator, and thrombin is a coagulation protease that promotes clot formation rather than fibrinolysis. Therefore, tissue plasminogen activator is the best answer.

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