What are the primary procoagulant roles of the blood vessel?
a. Constrict and provide collagen and other compounds to activate clotting
b. Prevent the blood from escaping and promote fibrinolysis
c. Secrete platelet growth factors and manufacture calcium
d. Constrict and synthesize most plasma coagulation factors
ANS: A
Blood vessels play a role in constriction of the vessel once it has been damaged. Collagen is located in the subendothelial tissue and is exposed once a vessel is damaged. They also provide other compounds, such as von Willebrand factor (VWF), which is necessary for platelet adhesion.
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