Blood - Platelets and Heamostasis

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1. Platlets are kept mobile but inactive by ________ and prostacyclin, which are secreted by endothelial cells lining the blood vessels

  • Nitric oxide
  • Spectrin
  • Albumin
1 of 20

Other questions in this quiz

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

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

3. During vascular spasm, blood vessels ____________ to significantly reduce blood loss

  • Constrict
  • Dilate

4. Megakaryocytes are progeny of the haemopoietic stem cell and the lymphoid stem cell

  • False
  • True

5. When platelets aggregate and stick together, which step in haemostasis is this?

  • Platelet plug formation
  • Vascular spasm
  • Coagulation

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