Hemostasis Quiz
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Questions and Answers

What is hemostasis?

  • A physiological process that stops bleeding (correct)
  • A process that promotes bleeding
  • A type of blood vessel
  • A type of blood cell

    • What is the primary function of hemostasis?

  • To stop bleeding (correct)
  • To transport oxygen in the blood
  • To regulate body temperature
  • To produce hormones

    • What is the primary purpose of the clotting cascade in hemostasis? multiple

  • To form blood clots when a blood vessel is injured (correct)
  • To reconstruct damaged vessels and heal wounds
  • To dissolve unwanted clots naturally
  • To trigger inflammation within blood vessels

    • What is the role of fibrinolysis in hemostasis?

    <p>To dissolve unwanted clots naturally (D)</p> Signup and view all the answers

    What is the process by which blood forms clots?

    <p>Coagulation (A)</p> Signup and view all the answers

    What does anticoagulation refer to?

    <p>Prevention of blood clot formation (D)</p> Signup and view all the answers

    What is the primary purpose of coagulation?

    <p>Formation of blood clots to prevent excessive bleeding (A)</p> Signup and view all the answers

    Which process is characterized by the formation of a blood clot within a blood vessel?

    <p>Coagulation (C)</p> Signup and view all the answers

    Which condition is associated with more coagulation than anticoagulation?

    <p>Thrombosis (D)</p> Signup and view all the answers

    Which condition is typically associated with issues in the coagulation process rather than anticoagulation?

    <p>bleeding disorders (C)</p> Signup and view all the answers

    What is the primary function of secondary hemostasis? multiple

    <p>Coagulation (fibrin formation) (B)</p> Signup and view all the answers

    What occurs during primary hemostasis? multiple

    <p>Vasoconstriction (B)</p> Signup and view all the answers

    What is the primary purpose of vascular spasm/vasoconstriction in response to a blood vessel injury?

    <p>To minimize blood loss by reducing blood flow to the injured area (B)</p> Signup and view all the answers

    What happens when a blood vessel undergoes vasoconstriction?

    <p>The smooth muscle in the vessel walls contracts, causing a reduction in vessel diameter (C)</p> Signup and view all the answers

    What is the effect of vasoconstriction on blood flow to the injured area?

    <p>It reduces blood flow to the injured area (D)</p> Signup and view all the answers

    What is the effect of vascular spasm/vasoconstriction on small vessels/arterioles?

    <p>It doesn't work on small vessels/arterioles (B)</p> Signup and view all the answers

    What is the primary function of coagulation?

    <p>Formation of a stable clot at the site of injury (B)</p> Signup and view all the answers

    What initiates the extrinsic pathway of coagulation?

    <p>Tissue Factor (Thromboplastin) (D)</p> Signup and view all the answers

    What is the conversion of fibrinogen into during coagulation?

    <p>Insoluble fibrin threads (B)</p> Signup and view all the answers

    What is the primary role of nitric oxide (NO) and prostacyclin (PGI2) in the regulation of platelet adhesion and aggregation?

    <p>Inhibiting platelet adhesion and aggregation (B)</p> Signup and view all the answers

    What is the origin of platelets?

    <p>Derived from megakaryocytes (B)</p> Signup and view all the answers

    What is a characteristic of platelets?

    <p>Non-nucleated (D)</p> Signup and view all the answers

    What is the primary function of Glycoprotein Ib (GP Ib) found on the surface of platelets?

    <p>Binding to von Willebrand factor (VWF) (A)</p> Signup and view all the answers

    What is the source of von Willebrand factor (VWF) protein?

    <p>Endothelial cells (A)</p> Signup and view all the answers

    Why is the binding between Glycoprotein Ib (GP Ib) and von Willebrand factor (VWF) important?

    <p>It is important in platelet aggregation (D)</p> Signup and view all the answers

    What is the primary role of von Willebrand factor (VWF) in platelet aggregation?

    <p>Facilitating the binding of platelets through GP Ib (D)</p> Signup and view all the answers

    What is the function of glycoprotein IIb/IIIa on the surface of platelets?

    <p>Enabling the binding of platelets to fibrinogen (C)</p> Signup and view all the answers

    What is the significance of the binding between glycoprotein Ib (GP Ib) and von Willebrand factor (VWF) in the context of platelet function?

    <p>Initiating platelet adhesion and aggregation (B)</p> Signup and view all the answers

    How are platelets activated when they come into contact with exposed collagen at the site of vascular injury?

    <p>They adhere or bind to it (C)</p> Signup and view all the answers

    What is the significance of platelet adhesion to exposed collagen in the context of hemostasis?

    <p>It forms the initial plug at the site of injury (D)</p> Signup and view all the answers

    What change in shape do activated platelets undergo?

    <p>From Spheroid to Irregular with Dense Filopodia (D)</p> Signup and view all the answers

    What do activated platelets synthesis primarily ?

    <p>Thromboxane A2 (C)</p> Signup and view all the answers

    What do activated platelets display on their surface to create enzymatic complexes of clotting factors?

    <p>Phospholipids (D)</p> Signup and view all the answers

    What is the primary change in shape that activated platelets undergo?

    <p>Change from spheroid to irregular with dense filopodia (C)</p> Signup and view all the answers

    What is the primary role of Factor X in the coagulation cascade?

    <p>Activation of thrombin (A)</p> Signup and view all the answers

    In which pathways of the coagulation cascade is Factor X involved?

    <p>Intrinsic and extrinsic pathways (B)</p> Signup and view all the answers

    What is the primary function of most clotting factors in the coagulation cascade?

    <p>Initiating the formation of blood clots (B)</p> Signup and view all the answers

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