Final answer:
The correct sequence of steps involved in the formation of a platelet plug is vascular spasm, platelet adhesion and activation, platelet aggregation, and platelet plug formation.
Step-by-step explanation:
The correct sequence of steps involved in the formation of a platelet plug is as follows:
- Vascular spasm
- Platelet adhesion and activation
- Platelet aggregation
- Platelet plug formation
In the first step, vascular spasm occurs, where the smooth muscle in the walls of the blood vessel contracts dramatically to constrict the flow of blood. Then, platelets adhere to the exposed collagen and endothelial lining, and become activated. Next, activated platelets aggregate and clump together at the site of injury. Finally, a platelet plug is formed, temporarily sealing the wound and preventing further loss of blood.