Immune System Concepts and Functions

The video tutorial provides an in-depth look at the immune system, detailing its complex structure of organs and tissues that facilitate innate and adaptive immunity. It explains the immune system's communication network, its regulation to maintain balance, and its role in protecting the organism. The maturation of lymphocytes in the bone marrow and thymus is discussed, highlighting the acquisition of surface markers and antigen recognition receptors. The process of lymphocyte selection, which ensures only functional cells survive, is also covered, emphasizing the importance of eliminating self-reactive cells to prevent autoimmune responses.

What are the two main types of immunity mentioned in the video?

• Primary and secondary

• Humoral and cell-mediated

• Active and passive

• Innate and adaptive

Which systems can the immune system communicate with?

• Digestive and respiratory

• Circulatory and muscular

• Skeletal and integumentary

• Nervous and endocrine

What are the primary lymphoid organs?

• Tonsils and adenoids

• Spleen and lymph nodes

• Liver and kidneys

• Bone marrow and thymus

Where do B lymphocytes mature?

• Thymus

• Lymph nodes

• Bone marrow

• Spleen

What is the role of the thymus?

• Maturation and education of T lymphocytes

• Production of red blood cells

• Storage of platelets

• Filtration of blood

What do B and T lymphocytes acquire during maturation?

• Nutrients and oxygen

• Enzymes and hormones

• Surface markers and antigen receptors

• Antibodies and antigens

What is the name of the antigen receptor on B lymphocytes?

• TCR

• CD4

• MHC

• BCR

What percentage of T cells pass the selection process?

• 10%

• 95%

• 50%

• 5%

What happens to T cells that strongly react with self-antigens?

• They undergo apoptosis

• They migrate to the spleen

• They become memory cells

• They differentiate into B cells

Where do naive B and T lymphocytes encounter antigens?

• Thymus

• Secondary lymphoid organs

• Bone marrow

• Primary lymphoid organs