This is the first function of the plasma proteins and the main function of albumin . Neural reflexes triggered by pain receptors. Chemical factors released by damaged tissue. Formation Of A Platelet Plug Temporarily seals holes in blood vessel walls. Positively charged platelets attracted to negatively charged collagen exposed by endothelium damage.
Platelets send out filopodia that entangle each other.
All of these ore platelets to the area. Prothrombin activator converts a plasma protein, prothrombin into thrombin. Thrombin catalyses the formation of fibrin from the plasma protein fibrinogen. The whole process is much more complicated than this involving over 30 different procoagulants. Not necessary for you to learn all of these.