Structure and Immune Function of the Lymphatic System

The video tutorial explores the lymphatic system's role in the immune system, detailing how immune cells recognize antigens and become activated. It covers the structure and function of lymph nodes, spleen, thymus, and mucosal associated lymphoid tissues (MALT), highlighting their roles in immune response and regulation. The lymphatic system facilitates interactions between immune cells, ensuring efficient defense against pathogens.

What is the primary role of the lymphatic system in the immune response?

• To recognize and respond to antigens

• To store nutrients

• To transport oxygen to tissues

• To produce red blood cells

What is the significance of costimulatory signals in immune cell activation?

• They produce antibodies

• They increase blood flow

• They help prevent false immune responses

• They store nutrients

How do lymph nodes help in coordinating immune responses?

• By producing hormones

• By organizing immune cells into specific compartments

• By storing fat

• By filtering blood

What is the function of dendritic cells in lymph nodes?

• To transport oxygen

• To store fat

• To present antigens to T cells

• To produce red blood cells

What is the main function of the spleen's red pulp?

• To produce antibodies

• To remove old red blood cells

• To store lymphocytes

• To filter lymph

How does the spleen contribute to iron recycling?

• By storing iron

• By breaking down old red blood cells

• By filtering lymph

• By producing new red blood cells

Where does early T cell development occur?

• In the lymph nodes

• In the thymus

• In the bone marrow

• In the spleen

What is the role of the marginal zone in the spleen?

• To transport oxygen

• To produce antibodies

• To filter circulating antigens

• To store lymphocytes

What is the role of M cells in the gut-associated lymphoid tissue (GALT)?

• To produce antibodies

• To transport oxygen

• To store nutrients

• To sample antigens from the intestinal lumen

How do mucosal surfaces prevent constant immune activation?

• By increasing blood flow

• By regulating immune responses

• By storing nutrients

• By producing hormones