Which of these immunoglobulins is present in external secretion?

Immunoglobulins, also known as antibodies, are glycoproteins that play a vital role in the body's immune system. They are produced by plasma cells (white blood cells) and are a key part of the immune response.  Immunoglobulins recognize and bind to antigens, such as bacteria or viruses, and help destroy them. They have five primary classes: IgG, IgM, IgA, IgD, and IgE. These classes are distinguished by the type of heavy chain found in the molecule.  Immunoglobulins have several biological functions, including: Activation of complement Binding Fc receptors Opsonization promotes... Show more

Immunoglobulins, also known as antibodies, are glycoproteins that play a vital role in the body's immune system. They are produced by plasma cells (white blood cells) and are a key part of the immune response. 

Immunoglobulins recognize and bind to antigens, such as bacteria or viruses, and help destroy them. They have five primary classes: IgG, IgM, IgA, IgD, and IgE. These classes are distinguished by the type of heavy chain found in the molecule. 

Immunoglobulins have several biological functions, including:
Activation of complement
Binding Fc receptors
Opsonization promotes phagocytosis
Mediated allergic reactions
Antibody-dependent cellular cytotoxicity, ADCC effect
Immune regulation 

An immunoglobulins blood test can be used to:
Check the health of your immune system
Help diagnose and monitor conditions that may cause abnormal levels of IgM, IgG, and/or IgA

Show less