All of these statements are true of the IgG antibody class except __________.
A) it is the most abundant antibody class in body secretions
B) it is the major antibody class in serum
C) it readily crosses the walls of blood vessels and enters tissue fluids
D) it can trigger the complement cascade
E) maternal IgG antibodies can cross the placenta and confer passive immunity to a fetus
Ans: A) it is the most abundant antibody class in body secretions
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