Question

1. Name the primary classes of antibodies and describe their structures. IgM: IgG: IgA: IgD: IgE:

2. In response to an antigen, which antibodies are secreted/produced first? Are all classes of antibodies found in the circulation at all times?

Answer 1

There are five primary classes of antibodies: IgM, IgG, IgA, IgD, and IgE. IgM is typically secreted first in response to an antigen. Not all classes of antibodies are found in the circulation at all times.

Step-by-step explanation:

There are five primary classes of antibodies found in humans: IgM, IgG, IgA, IgD, and IgE. Each class has a different structure and specific functions in the immune response. IgM consists of five four-chain structures and is the largest antibody molecule. IgG, IgA, and IgD have three constant domains per heavy chain, while IgE has four constant domains per heavy chain. The variable domain determines the binding specificity, and the constant domain of the heavy chain determines the immunological mechanism of action of the antibody class.

In response to an antigen, IgM is usually the first antibody to be secreted/produced during the primary response. However, not all classes of antibodies are found in the circulation at all times. IgM, IgG, and IgA are commonly found in the circulation, while IgD and IgE are present in smaller quantities and have different roles in the immune response.

Answer 2

1. There are five primary classes of antibodies, that are IgM, IgG, IgA, IgD, IgE.

2. IgM

Step-by-step explanation:

The antibodies are proteins that are Y-shaped and are also called immunoglobulins. The antibody is produced when any pathogen attacks the body. There are five primary classes of antibodies, that are IgM, IgG, IgA, IgD, IgE. The antibody contains two heavy and two light chains. The IgM is a pentamer immunoglobulin. The IgG is contains two gamma heavy chains and two light chains. The IgA is mostly monomeric. The IgD have two delta heavy chains and light chains. The IgE contains two ∈ chains and light chains.

IgM is produced first. The IgA produced after IgM on mucosal surfaces. The IgG is present in serum. The all immunoglobulins IgM, IgA, IgD, IgE, and IgG are abundant in blood circulation.