A client is admitted to a healthcare facility with minor lacerations on the leg. The nurse caring for this client observes swelling in the tissues surrounding the affected area. A blood clot is suspected
What is the first step in the formation of a blood clot? A) Prothrombin activator starts to react with additional calcium ions.
B) Platelets break down and cause the release of thromboplastin.
C) Thrombin converts the plasma protein fibrinogen into threads.
D) The threads of fibrin form a net to entrap red blood cells and platelets.
B
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When tissue is injured, first the platelets break down and cause the release of a chemical thromboplastin, which then interacts with certain protein factors and calcium ions to form prothrombin activator. Prothrombin activator reacting with additional calcium ions, thrombin converting the plasma protein fibrinogen into threads, or the threads of fibrin forming a net to entrap RBCs and platelets are the subsequent stages of blood clotting, not the first step.
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