The Immune System Lecture Summary

These flashcards cover key concepts from the lecture on the immune system, including its structure, function, components, and related pathologies.

What is the primary function of the immune system?

The immune system defends the body against harmful invaders like bacteria, viruses, fungi, and other pathogens.

What is the function of lymph nodes in the immune system?

Lymph nodes filter lymph, removing harmful substances and containing immune cells that help fight infections.

What are the components of the lymphatic system?

The components include interstitial fluid (lymph), lymph nodes, lymph nodules, thymus, spleen, and bone marrow.

What hormone does the thymus produce that is essential for T-cell development?

The hormone is thymosin, and it stimulates T-cell maturations

What type of immunity is present at birth?

Innate immunity.

What is an antigen?

An antigen is a foreign substance that triggers an immune response.

What are the two main types of leukocytes involved in the immune response?

Lymphocytes and phagocytes.

What is the role of B-cells in the immune system?

B-cells recognize invaders and produce antibodies to fight specific infections.

What is the significant risk when the immune system is weakened?

It makes the body more susceptible to infections and diseases.

What is an autoimmune disease?

An autoimmune disease occurs when the immune system attacks the body's own healthy cells and tissues.

What is the definition of chronic fatigue syndrome?

Chronic fatigue syndrome is persistent fatigue not relieved by rest, often linked to various conditions.

How does HIV affect the immune system?

HIV weakens the immune system by destroying T-lymphocytes (T-cells), making the body vulnerable to infections.

What is anaphylaxis?

Anaphylaxis is a life-threatening allergic response characterized by difficulty breathing and swelling in the airway.

What is the process of hematopoiesis?

Hematopoiesis is the process of making blood cells in the bone marrow.

What is the main purpose of immunizations?

Immunizations help train the immune system to recognize and respond to infectious agents without causing the disease.