Summary: Blood After Exam 1

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  • 11.9 blood after exam 1

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  • stoppage of bleeding resulting from a break in blood vessel

    hemostasis
  • vascular spasmplatelet plug formationcoagulation

    hemostasis phases
  • vascular spasms help

    extreme vasoconstriction due to smooth muscle in vessel wall
    spasms narrow the blood vessel, decreasing blood loss
  • release  signallying molecules to attract platelets

    anchored platelets
  • platelet plug formation includes

    collagen fibers inside blood vessel walls are exposed by break
     platelets become sticky and cling to collagen fibers
    anchored platelets release chemicals to attract more platelets
    platelets pile up to form platelet plug
  • in coagulation, injured tissue cells release

    tissue factor
  • platelet factor 3 is a __

    phospholipid
  • triggers a clotting cascade

    platelet factor 3 interacts with tissue factor
    dozens of different blood protein clotting factors
    calcium ions
  • activates factor x: prothrombin activator

    clotting cascade
  • prothrombin activator converts __ to __

    prothrombin to thrombin
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