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Home Q & A Board Biology-Related Homework Help Medicine
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bl442113 bl442113
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6 years ago
The lab test used to evaluate the effectiveness of heparin therapy is used because it demonstrates the action of heparin in interfering with the conversion of:
 
  a. prothrombin to fibrinogen c. prothrombin to thrombin
  b. thrombin to thromboplastin d. proconvertin to proaccelerin
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#1
6 years ago
ANS: C

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A Incorrect: Prothrombin does not convert to fibrinogen.
B Incorrect: Thrombin does not convert to thromboplastin.
C Correct: The actual partial thromboplastin time measures how effectively heparin interferes with the conversion of prothrombin to thrombin.
D Incorrect: These two clotting factors are not affected by heparin.
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