Blood - Platelets and Heamostasis

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1. Name the potent aggregating agent released by platelets that causes more platelets to stick and release their contents

  • Thromboxann A2
  • Adenosine diphosphate
  • Seratonin
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2. Platlets are kept mobile but inactive by ________ and prostacyclin, which are secreted by endothelial cells lining the blood vessels

  • Nitric oxide
  • Spectrin
  • Albumin

3. Vascular spasm can reduce blood loss for about ________ minutes

  • 30 - 45
  • 10 - 15
  • 20 - 30
  • 2 - 5

4. In most cases activation turns most clotting factors into _________

  • Albumins
  • Serotonins
  • Enzymes
  • Plasma proteins

5. There are ___ phases to coagulation

  • 3
  • 9
  • 2
  • 6
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