The Alternative and Classical complement pathways differ in that ONLY the Classical pathway ____.1 pointuses the breakdown products of C3 and C5 as signals to activate other elements of the immune systemattaches proteins to the surface of pathogen that promote phagocytosisconstructs a pore with variable number of C9 moleculesresults in the breakdown of C2 and C4begins with the stabilization of the natural breakdown product of C3

The complement system consists of over 30 different proteins that work together in a cascade fashion to protect us against infectious agents. One way this system is activated is via the __________, when complement proteins are activated by directly interacting with a pathogen.ANSWERclassical pathwaycomplement pathwaylectin pathwayalternative pathway

Choose the INCORRECT statement from the options below.Opsonization of pathogens is one of the consequences of complement activation.The classical pathway is initiated by the activation of C5 to form C5a and C5b.MB-lectin proteins bind to mannose-containing carbohydrates on pathogen surface.C3a and C5a are peptide mediators of inflammation.

Select all that applyWhat can activate complement?Multiple select question.Pathogen surface moleculesMBL proteinPhagocytosis

Which of the following are potential outcomes following complement activation?SELECT ALL THAT APPLYGeneration of antimicrobial peptidesOpsonization of pathogens for phagocytosisInduction of a memory response by B and T cellsApoptosis of virus-infected cellsCytolysis of pathogens through formation of the membrane attack complex (MAC)Induction of an inflammatory response

L'opsonisation des micro-organismes pathogènes par les fragments actifs du complémentAEst assuré uniquement par le c3b et c4b.BDiminue la prise en charge des pathogènes par les phagocytes.CEst régulée par une molécule clé dite c1 inhibiteur.DNécessite l'expression de récepteurs des fragments inactifs du complément.EAucune de ces réponses n'est juste.