An individual has accidentally cut his hand, immediately initiating the process of hemostasis. Following vasoconstriction, what event in the process of hemostasis will take place?
A) Fibrin will be activated at the bleeding site.
B) Platelets will aggregate at the injury site.
C) Thromboplastin will form a clot.
D) Prothrombin will be converted to thrombin.
Ans: B
Feedback:
Following vasoconstriction, circulating platelets aggregate at the site and adhere to the vessel and to one another, forming an unstable hemostatic plug. Events involved in the clotting cascade take place subsequent to this initial platelet action.
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