Question 1
An individual is more susceptible to infections of mucous membranes when he or she has a seriously low level of which immunoglobulin antibody?
◦ IgG
◦ IgM
◦ IgA
◦ IgE
Question 2
How does the B-cell receptor (BCR) complex function?
◦ Communicating information about the antigen to the helper T cell
◦ Secreting chemical signals to communicate between cells
◦ Releasing histamine and other vasoactive substances
◦ Communicating information about the antigen to the cell nucleus