Day 1 Flashcards
(75 cards)
What is the result of the activation of the hemostatic mechanism?
Formation of a thrombus or platelet plug
Platelet adhesion to exposed collagen within the endothelium of the vessel was, describes which type of hemostasis?
Primary hemostasis(platelet)
Enzymatic activation of coagulation proteins to produce fibrin from fibrinogen, describes which type of hemostasis?
Secondary hemostasis (coag)
What is vasoconstriction and why does it occur?
Damaged blood vessels contracts to decrease blood flow
What two things must be true about platelets in order for a platelet plug to form?
Must be adequate in numbers
Must be functioning normally
What are the 5 steps of the hemostatic mechanism?
- Vasoconstriction
- diversion of blood flow
- Initiation of contact activation of platelets
- Activation: intrinsic & extrinsic =fibrin clot
- Slow lysis of the clot occurs over time and the injury heals
What factor is the precursor of fibrin?
Factor I
What is the name of Factor VIII?
Antihemophilic Factor
What factor can be found in all body tissues and converts prothrombin to thrombin?
Factor III (Tissue Thromboplastin)
What factor is known as Proaccelerin or Labile Factor?
Factor V
What factor is the most abundant of the vitamin K-dependent clotting proteins?
Factor II (Prothrombin)
What factor is not destroyed or consumed in the clotting process and is essential only for the extrinsic pathway?
Factor VII (Proconvertin or Stable Factor)
Which factor helps to activate thromboplastin and convert prothrombin to thrombin? It also serves as a bridge between platelets and clotting factors?
Factor IV
What factor’s absence causes hemophilia B?
Factor IX(Plasma Thrombin Component)
What factor is also known as Hageman Factor?
Factor XII
What is the name for factor X?
Stuart-Prower Factor
What factor is essential for the intrinsic pathway, does not depend on vitamin K, and is synthesized in the liver?
Factor XI
What factor stabilizes the fibrin clot and is important in tissue growth and repair?
Factor XIII (Fibrin Stabilizing Factor)
What factor activates plasminogen?
Fletcher Factor (Prekallikrein)
What factor is also known as High Molecular Weight Kininogen?
Fitzgerald Factor
What are the three components of the hemostatic mechanism?
- Extravascular effects
- Vascular effects
- Intravascular effects
What is the function(s) of platelets?
Release substance for vasoconstriction, platelet aggregation, coagulation and vascular repair
Coagulation factors are _______ in nature with the exception of calcium .
Protein
What are the three groups of coagulation factors and what are included in each?
Fibrinogen Group
Prothrombin Group
Contact Group