Final answer:
In the second step of platelet plug formation, platelets clump together, become spiked and sticky, and bind to the exposed collagen and endothelial lining of the vessel. This process is assisted by a glycoprotein called von Willebrand factor. Platelets also release chemicals that contribute to hemostasis.
Step-by-step explanation:
In the second step of platelet plug formation, platelets clump together, become spiked and sticky, and bind to the exposed collagen and endothelial lining of the vessel. This process is assisted by a glycoprotein called von Willebrand factor, which helps stabilize the growing platelet plug. Platelets also release chemicals from their granules into the plasma that contribute to hemostasis. These chemicals include substances that activate additional platelets and initiate fibrin formation.