BOF 44
The complement system, all are true except:
1-the classical pathway can be activated by IgG immune
complexes
2-properdin deficiency is usually X linked
3-deficiency of late complements components is
associated with disseminated Neisseria infection
4-SLE may be induced by congenital deficiency of the
early complements components
5-C1 esterase inhibitor deficiency is autosomal
dominant and the defect is qualitative in 90% of cases