Toxicity Test Results.pdf

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Immunology and Biology

When foreign substances enter the body, they trigger an immune response. The immune system produces antibodies to neutralize the foreign substances. The antibodies bind to specific antigens on the surface of the foreign substances, marking them for destruction.

Structure of Immunoglobulins

Immunoglobulins, also known as antibodies, are Y-shaped proteins composed of four polypeptide chains: two heavy chains and two light chains. The heavy chains have a constant region and a variable region, which binds to the antigen. The light chains also have a constant region and a variable region.

Types of Immunoglobulins

There are five classes of immunoglobulins: IgA, IgD, IgE, IgG, and IgM. Each class has a different function and is produced in response to different types of antigens.

Antigen-Antibody Reaction

When an antigen enters the body, it triggers the production of antibodies. The antibodies bind to the antigen, forming an antigen-antibody complex. This complex is then removed from the body by immune cells such as macrophages and neutrophils.

Immune Response

The immune response involves the activation of immune cells such as T cells and B cells. T cells recognize antigens and activate B cells, which produce antibodies. The antibodies then bind to the antigen, marking it for destruction.

Functions of Immunoglobulins

Immunoglobulins have several functions, including:

Neutralizing toxins and viruses
Marking antigens for destruction
Activating immune cells such as macrophages and neutrophils
Providing immunity to infections

Importance of Immunology

Immunology is important for understanding how the body responds to infections and diseases. It has led to the development of vaccines and immunotherapies, which have saved countless lives.

Conclusion

In conclusion, immunology is the study of the immune system and its response to foreign substances. Understanding how the immune system works is crucial for developing effective treatments and vaccines against diseases.