A baby will receive ________ class of antibodies from his or her mother before birth through the umbilical cord, and then ________ class of antibodies through the breast milk after birth.
A) IgG; IgA
B) IgM; IgD
C) IgG; IgM
D) IgM; IgA
E) IgE; IgG

Question

Quizplus · Accepted Answer

The correct answer is A because IgG class of antibodies are transferable through the placenta during fetal development and provide passive immunity to the baby against pathogens that the mother was exposed to. After birth, the baby receives IgA class of antibodies through breast milk, which protect the baby's mucosal surfaces against infections. The other choices, IgM, IgD, IgE, are not typically transferred or produced in significant amounts in a baby during the first few months of life.

A Baby Will Receive ________ Class of Antibodies from His