two
IgM
IgG antibodies account for the bulk of circulating antibodies in the blood. They are the most abundant class of antibodies and play a crucial role in providing long-term immunity.
IgM is the class of antibody first secreted in response to a new antigen. It is produced during the initial immune response and helps to activate other components of the immune system.
class 5
A class 3 office
I would assume IgA class antibodies. The intestinal tract is lined with mucous membranes and the IgA class is primarily secreted through mucous.
The class of immunoglobulin that is produced in the primary immune response is Immmunoglobulin M (IgM). On secondary exposure, the class that predominates would be Immunoglobulin G (IgG).
IgG molecules.
Antibody
The class of immunoglobulin to respond to the fist exposure of an antigen is immunoglobulin class M (IgM). While Immunoglobulin G (IgG) would predominate on the second exposure.
the antibody can be uncontrollable