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1. The first step in hemostasis is ________.
 
 
 
 

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2. Prothrombin is converted to thrombin during the ________.
 
 
 
 

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3. Hemophilia is characterized by ________.
 
 
 
 

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4. Critical Thinking: A lab technician collects a blood sample in a glass tube. After about an hour, she harvests serum to continue her blood analysis. Explain what has happened during the hour that the sample was in the glass tube.

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5. Critical Thinking: Explain why administration of a thrombolytic agent is a first intervention for someone who has suffered a thrombotic stroke.

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