<prompt> Chemotaxis in response to activation of cells results in-Random multidirectional movementUnidirectional motionAdhesion to endotheliumAugmeted oxygen dependent bactericidal effect  <response>: Ans. b Unidirectional motionRef: 9thpg 77; 8thpg 50Unidirectional movement9 of the leukocytes towards site of injury along a chemical gradient.Exogenous QBacterial products: N-formylmethionine terminal amino acid Q and some lipidsEndogenous Products. Complement system-C5a Q. Arachidonic acid AA metabolites-LTB4 Q. Cytokines- IL-8 Q 