In thromboasthenia there is a defect in –

Platelet adhesion Platelet adhesion referes to the binding of platelets to subendothelial matrix. Platelet membrane glycoprotein Ib-IX is essential for platelet adhesion to subendothelial matrix. Platelet aggregation Platelet aggregation referres to adherence of platelets to one another. Platelet membrane glycoprotein ddb-IIIa helps in aggregation. Congenital dysfunction of platelet 1. Bernard-soulier syndrome Defect in platelet adhesion due to inherited deficiency of glycoprotein Ib-IX. 2. Glanzmann's thrombasthenia Defect in platelet aggregation due to inherited deficiency of glycoprotein Ilb-IIIa.