3S [LEC]: Secondary Hemostasis Flashcards
(54 cards)
Extrinsic pathway starts with the release of ___ from injured blood vessels
Tissue factor (factor III)
Intrinsic pathway is activated when coagulation proteins are exposed to ___
Collagen
The goal of secondary hemostasis is the generation of sufficient ___ to convert fibrinogen to fibrin
Thrombin (factor IIa)
Coagulation pathway that is dominant in vivo
Extrinsic pathway
Common pathway begins with ___ activation by the extrinsic or intrinsic pathway
Factor X
T/F: Coagulation factors can be used as a secondary test for liver function
True
Coagulation factors are produced mostly in the ___, and circulate in an active precursor form
Liver
Coagulation factors are also known as ___
Zymogens (enzyme precursors)
Zymogens are converted into active forms called ___ to possess biologic activity
Serine proteases
The only electrolyte that is an activator in blood coagulation
Ca2+ (factor IV)
Which factor is converted into transglutaminase instead of serine protease when activated?
Factor XIII
The only substrate in the cascade that does not become an activated enzyme
Fibrinogen (factor II) (converted into fibrin)
T/F: Factor XII deficiency will cause a bleeding condition
False (thrombotic condition)
Which factors are part of the intrinsic pathway?
XII, XI, IX, VIII
Which factor/s is/are part of the extrinsic pathway?
VII
Which factors are part of the common pathway?
X, V, II, I
In the common pathway, which factor will convert factor Xa to factor II?
V
Most abundant coagulation factor
Factor I
Factors that are part of the fibrinolytic system
XII, Prekallikrein, HMWK
Aside from factor XIa, which factor may also activate factor IX?
Factor VII
Which factor converts factor IX, to factor X?
Factor VIII
This factor is activated by factor XIIa, which also activates factor XII once activated
Prekallikrein (activated to Kallikrein, which will activate factor XII)
This factor will help in the activation of prekallikrein to kellikrein
HMWK
Identify the coagulation factor based on its common/ other name:
Contact factor
Factor I