B cells Flashcards
1
Q
Which immunoglobulins cross the placenta?
A
IgG
2
Q
Describe IgG function.
A
most abundant in serum
fixes complement, opsonizes bacteria, neutralizes bacterial toxins and viruses
3
Q
Describe IgA function
A
prevents attachment of viruses/bacteria to mucous membranes
monomer in circulation, dimer attached by J chain when secreted
crosses epithelial cells by transcytosis, produced in GI tract by Peyers patches
protects against gut infections
4
Q
Which immunoglobulins are in breast milk?
A
IgA
