When a Blood Vessel Is Injured,it Releases Chemicals That Activate

Multiple Choice

When a blood vessel is injured,it releases chemicals that activate platelets and cause them to stick to the injury site.The activated platelets in turn release more chemicals and attract more platelets to the injury site until the wound is fully sealed.This process of blood clotting is an example of

A) negative feedback.
B) positive feedback.
C) feedforward regulation.
D) adaptation.
E) acclimatization.