What is the role of platelets?

What is the role of platelets?

• A. fight infections
• B. clots the blood to stop bleeding
• C. carry oxygen
• D. regulate blood sugar

Answer: (B)

Platelets are the components of blood that drive the rapid response to vessel injury. When a blood vessel is damaged, platelets quickly adhere to the exposed area, stick together to form a temporary plug, and release chemicals that start the coagulation cascade. This leads to a fibrin clot that reinforces the plug, sealing the wound and preventing further bleeding as the vessel heals. Fighting infections is the job of white blood cells; carrying oxygen is the function of red blood cells; regulating blood sugar involves hormones and metabolic processes, not platelets.

Platelets are the components of blood that drive the rapid response to vessel injury. When a blood vessel is damaged, platelets quickly adhere to the exposed area, stick together to form a temporary plug, and release chemicals that start the coagulation cascade. This leads to a fibrin clot that reinforces the plug, sealing the wound and preventing further bleeding as the vessel heals.

Fighting infections is the job of white blood cells; carrying oxygen is the function of red blood cells; regulating blood sugar involves hormones and metabolic processes, not platelets.