Which substance released from platelets promotes vasoconstriction at the site of injury?
Show answer and explanation
Correct answer: Serotonin
Serotonin released from platelet granules causes local vasoconstriction. This helps reduce blood loss following vascular injury.
Keep practicing
More Platelets and Clotting Disorders questions
- Platelet adhesion to damaged endothelium is primarily mediated by:
- Which platelet receptor is responsible for binding fibrinogen during platelet aggregation?
- Which vitamin is essential for the synthesis of several clotting factors?
- The intrinsic pathway of coagulation is initiated by activation of:
- Which laboratory test primarily evaluates the extrinsic pathway of coagulation?
- Hemophilia A is caused by deficiency of which clotting factor?