Which component is directly involved in blood clotting?

Which component is directly involved in blood clotting?

• A. Plasma
• B. Platelets
• C. White Blood Cells
• D. Red Blood Cells

Answer: (B)

Platelets are the cells that directly drive blood clotting. When a blood vessel is damaged, platelets quickly adhere to exposed tissue and each other, become activated, and release chemical signals that recruit more platelets. This creates a platelet plug, the initial scaffold of a clot. Platelets also provide a surface that helps the coagulation cascade convert fibrinogen in plasma into fibrin, which forms a mesh to stabilize and strengthen the clot. Plasma contains the clotting factors needed for this cascade, but the actual rapid, initial plug-and-surface formation is done by platelets. White and red blood cells aren’t directly forming the clot.

Platelets are the cells that directly drive blood clotting. When a blood vessel is damaged, platelets quickly adhere to exposed tissue and each other, become activated, and release chemical signals that recruit more platelets. This creates a platelet plug, the initial scaffold of a clot. Platelets also provide a surface that helps the coagulation cascade convert fibrinogen in plasma into fibrin, which forms a mesh to stabilize and strengthen the clot.

Plasma contains the clotting factors needed for this cascade, but the actual rapid, initial plug-and-surface formation is done by platelets. White and red blood cells aren’t directly forming the clot.