UAMS Hematology Exam #6 questions with correct answers

PTT - Answer What is the intrinsic system tested with? PT - Answer What is the extrinsic system tested by? HMW kininogen and prekalikrein activate the extrinsic, whereas exposed collagen that releases thromboplastin activates the intrinsic pathway. - Answer What activates the extrinsic pathway? What about the intrinsic pathway? PT and PTT - Answer What is the common system tested by? 2, 7, 9, and 10 - Answer What factors are associated with Factor K? 1, 5, 8, 13, and 2 - Answer What are the consumable factors? Hemostasis - Answer What is the process of keeping blood in the fluid state unless clotting occurs due to vascular injury? Primary hemostasis is the platelet plug formed on damaged vessels, whereas secondary hemostasis is the fibrin formation from plasma factors. - Answer What is the difference between primary and secondary hemostasis? To form an endothelial layer and prevent RBCs from escaping. The release of exposed substances such as collagen and Von Willebrands factor causes a break in the system allowing RBCs to escape which causing bleeding and bruising. Vasoconstriction occurs to stop the blood flow. - Answer What is the role of the vascular system? What causes a break in this system? What puts a stop to this?