Chapter 36 Hemostasis and Blood Coagulation

Chapter 36  Hemostasis and Blood Coagulation

Complete Chapter Questions And Answers
 

Sample Questions

1. What is the proper pathway for the extrinsic clotting pathway?
A. Contact of blood with collagen, formation of prothrombin activator, conversion of prothrombin into thrombin, conversion of fibrinogen into fibrin threads
B. Tissue trauma, formation of prothrombin activator, conversion of prothrombin into thrombin, conversion of fibrinogen into fibrin threads
C. Activation of platelets, formation of prothrombin activator, conversion of
D. Prothrombin into thrombin, conversion of fibrinogen into fibrin threads.
E. Trauma to the blood, formation of prothrombin activator, conversion of
F. Prothrombin into thrombin, conversion of fibrinogen into fibrin threads

ANS: B

2. What condition leads to a deficiency in factor IX that can be corrected by an intravenous injection of vitamin K?
A. Classic hemophilia
B. Hepatitis B
C. Bile duct obstruction
D. Genetic deficiency in antithrombin III

ANS: C

3. A 2-year-old boy bruises easily and has a history of nosebleeds. His physical examination shows several small bruises on the legs. You would suspect that this patient has a deficiency of which coagulation factor?
A. Prothrombin activator
B. Factor II
C. Factor VIII
D. Factor X

ANS: C

4. Which one of the following substances cannot prevent coagulation when added to a blood sample (i.e., in the test tube)?
A. Heparin
B. Coumarin
C. Citrate
D. Calcium chelators

ANS: B

5. All of the following statements regarding heparin are correct EXCEPT:
A. Heparin acts by increasing the effectiveness of antithrombin III
B. The concentration of heparin in the blood is normally very slight
C. Heparin can be an effective anticoagulant even in the absence of antithrombin III
D. Heparin is a powerful anticoagulant
E. Heparin can be produced and released by basophils and mast cells

ANS: C