Fibrinolysis is responsible for
A. activation of the intrinsic pathway of coagulation.
B. activation of the extrinsic pathway of coagulation.
C. clot retraction.
D. clot dissolution.
E. clot consolidation.
(
Question 2) Healing after clot formation involves
A. clot retraction.
B. repair of the damaged blood vessel by connective tissue cells.
C. clot dissolution.
D. serum being squeezed out of the clot.
E. All of these choices are correct.
(
Question 3) What ion is necessary for the coagulation process?
A. sodium
B. potassium
C. magnesium
D. calcium
(
Question 4) Arrange the following events of coagulation in proper sequence. (1) prothrombin thrombin (2) fibrinogen fibrin (3) activation of factor XII (4) formation of prothrombinase
A. 4, 3, 1, 2
B. 2, 4, 3, 1
C. 3, 4, 1, 2
D. 3, 2, 4, 1
E. 1, 2, 3, 4
(
Question 5) Coumadin (Warfarin)
A. is a potent anticoagulant.
B. is produced by eosinophils.
C. blocks the action of factor X.
D. dissolves blood clots.
E. promotes coagulation.
(
Question 6) Choose the arrangement that lists the chemicals in the order in which they would be used for coagulation. (1) thrombin (2) fibrinogen (3) prothrombinase (4) activated factor XII
A. 3, 2, 4, 1
B. 4, 3, 2, 1
C. 4, 3, 1, 2
D. 3, 4, 1, 2
E. 3, 1, 4, 2
(
Question 7) In the extrinsic pathway, damaged tissues release
A. activated factor V.
B. calcium.
C. factor VII.
D. thromboplastin (tissue factor III)
E. factor XII.
(
Question 8) Which of the following events is one of the three main stages of coagulation?
A. conversion of fibrinogen to fibrin
B. platelet aggregation
C. conversion of thrombin to prothrombin
D. platelet plug formation
E. calcium is released
(
Question 9) A deficiency of which of the following stem cells would result in a marked increase in the clotting time of blood?
A. lymphoblast
B. megakaryoblast
C. monoblast
D. myeloblast
E. proerythroblast
(
Question 10) When a blood vessel is damaged, which of the following events occurs last?
A. Collagen is exposed.
B. Platelets adhere to collagen.
C. Platelets are activated.
D. Platelets begin to stick to each other and form a plug.
E. von Willebrand factor is produced.
Quick Reply
