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Coagulation factors are mostly synthesized in what part of the body?
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Liver
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How many coagulation factors are zymogens (inactive enzyme form)?
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8
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Coagulation factors that bind, stabilize, and enhance the activity of their respective zymogens are called as?
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Cofactors
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A crude mixture of tissue factor and phospholipid will result to?
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Tissue thromboplastin
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Platelet phospholipids (phosphatidylserine) were once called as?
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Platelet factor 3
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Serine protease procoagulants. (7)
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Factor 2
Factor 7 Factor 9 Factor 10 Factor 11 Factor 12 Prekallikrein |
Cofactor procoagulants (4).
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Factor 3
Factor 5 Factor 8 HMWK |
Coagulation factor as the only transamidase/transglutaminase.
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Factor 13
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The ultimate thrombin substrate of the coagulation pathway.
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Fibrinogen
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Known as Fibrinogen.
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Factor 1
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Known as Fibrin.
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Factor 1a
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Known as Prothrombin.
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Factor 2
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Known as Tissue factor.
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Factor 3
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Known as Ionic calcium.
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Factor 4
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Known as Labile factor.
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Factor 5
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Known as Stable factor.
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Factor 7
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Known as Antihemophilic factor.
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Factor 8
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Known as Christmas factor.
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Factor 9
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Known as Stuart-Prower factor.
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Factor 10
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Known as Plasma thromboplastin antecedent (PTA).
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Factor 11
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Known as Hageman factor.
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Factor 12
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Known as Fletcher factor.
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Prekallikrein
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Known as Fitzgerald factor.
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High-molecular-weight kininogen (HMWK)
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Known as Fibrin-stabilizing factor.
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Factor 13
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Required for the assembly of coagulation complexes on platelet or cell membrane phospholipids.
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Calcium
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What will happen in zymogen activation is uncontrolled and generalized?
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DIC
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The only insoluble coagulation factor.
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Factor 3
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What is the minimum level for most coagulation factors to achieve hemostatic effectiveness and that level must be maintained to prevent bleeding in factor-deficient patients.
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25-30%
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What desirable level of Antihemophilic factor must be maintained for a hemophilic patient on therapy?
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Above 30%
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Coagulation factor with the lowest half-life of 6 hrs.
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Factor 7
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Coagulation factor with the highest half-life of 156 hrs.
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HMWK
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Vitamin K-dependent prothrombin group.
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Factor 2
Factor 7 Factor 9 Factor 10 |
Vitamin K-dependent regulatory proteins.
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Protein C, S, Z
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Vitamin K is produced by what intestinal microorganisms?
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Bacteroides fragilis
E. coli |
Steps of Vitamin K function in coagulation.
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1. Vitamin K catalyzes y-carboxylation of amino-terminal glutamic acid.
2. When a 2nd carboxyl group is added to the y carbon, glutamic acid is modified to y-carboxyglutamic acid . 3. With 2 ionized carboxyl group, y-carboxyglutamic acids gain a net (-) charge, enabling them to bind Ca²+. 4. The bound Ca²+ enables Vitamin K-dependent procoagulants to bind to (-) charged phospholipids to form coagulation complexes. |
What will happen if there is a presence of warfarin as a Vitamin K antagonist?
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1. Vitamin K-dependent procoagulants are released in the liver without the 2nd carboxyl group added to the gamma carbon.
2. Because they lack the 2nd carboxyl group, they cannot bind to Ca²+ & phospholipid, thus, cannot participate in the coagulation reaction. |
Extrinsic tenase complex.
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7a:TF:Ca²+
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Intrinsic tenase complex.
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9a:8a:Ca²+
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Prothrombinase complex.
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10a:5a:PF3:Ca²+
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Vitamin K-dependent procoagulants without 2nd carboxyl group added to the y carbon are called as?
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Proteins in Vitamin K Antagonism (PIVKAs)
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Extrinsic tenase complex activates what coagulation factor?
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Factor 9 & 10
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Intrinsic tenase complex activates what coagulation factor?
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Factor 10
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Prothrombinase complex activates what coagulation factor?
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Factor 2 (Prothrombin)
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A marker for thrombin generation.
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Prothrombin fragment 1.2
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