Question

What immunoglobulin is primarily found in secretions and has a primary function of providing local immunity on mucosal surfaces?

Answer 1

Answer: It is called Immunoglobulin A or IgA.

Step-by-step explanation:

Immunoglobulins are proteins or antibodies produced the lymphocytes (white blood cells) that play crucial role in immune body response. These proteins attach to invading foreign substance like bacteria and destroy them. IgA or Immunoglobulin A is a type of immunoglobulin found in secretions and play important role in immune functions of the mucosa membranes. This immunoglobulin is found in mucous secretions such as tears, saliva,sweat, colostrum, respiratory epithelium e.t.c. It is sibdivide d into two; IgA 1 and IgA 2. IgA immunoglobulin is 15% of all the antibody secreted in the body. The quantity of IgA secreted in the mucosal membranes is more than a the antibody secreted in the body.

Answer 2

IgA Or immunoglobulin A

Step-by-step explanation:

Immunoglobulins are the class of proteins that provide protection to the humans against the invading pathogens called antigens and thus are also named the antibodies.

These antibodies are secreted by the plasma cells and are found in five forms in which each form has a specific role in providing immunity.

The IgA is the immunoglobulin which accounts for about 15% of all the antibodies as it is found in the tears, saliva, gastrointestinal and vaginal secretions. The IgA provides protection on mucous surfaces.

Thus, IgA is the correct answer.