<prompt> Endothelial ligands VCAM and ICAM are involved in?PhagocytosisAdhesionChemotaxisLeukocyte activation  <response>: Ans. is b i.e., Adhesion ICAM intracellular adhesion molecule-1 and VCAM Vascular cell adhesion molecule-1 act as adhesion molecules in the process of diapedesis. Platelet endothelial cell adhesion molecule PECAM or CD-31 is present on both endothelium and leukocytes. It is the major adhesive molecule for diapedesis.Endothelial - Leukocyte Adhesion MoleculesEndothelial moleculeLeucocyte MoleculeMajor RoleP-selectinSialyl-Lewis X-modified proteinsRollingE-selectinSialyl-Lewis X-modified proteinsRolling and adhesionGlyCam-1, CD34L-selectinRollingICAM-1 Immunoglobulin familyCD11CD18 b2 integrin LFA-1, Mac-1Adhesion, arrest, transmigrationVCAM-1 Immunoglobulin familyVLA-4 b-1 integrinAdhesionPEC AM-1 CD-31PEC AM-1 CD -31Diapedesis transmigration 