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Week 14

Lymphatic and immune system

QuestionAnswer
How does lymph move through the lymphatic system? Lymph is moved by skeletal muscle contractions, breathing movements, and one-way valves that prevent backflow.
What is the role of the lymphatic capillaries? They absorb excess fluid from tissues and begin the transport of lymph.
How does the lymphatic system help with fat absorption? Lacteals in the small intestine absorb dietary fats and transport them as chyle.
What is the function of lymph nodes in immune response? They filter lymph, expose it to immune cells, and trap pathogens for destruction.
How do T cells function in the immune response? T cells destroy infected cells (cytotoxic T cells) or help activate other immune cells (helper T cells).
How do B cells respond to pathogens? B cells produce antibodies that bind to specific antigens, neutralizing or marking them for destruction.
How does the body develop immunity after exposure to a pathogen? Memory B and T cells are formed during the adaptive immune response, allowing faster and stronger responses upon re-exposure.
What triggers inflammation and what does it do? Inflammation is triggered by injury or infection. It increases blood flow, brings immune cells to the site, and helps isolate and destroy invaders.
What are cytokines and what is their role? Cytokines are signaling proteins released by immune cells to regulate inflammation and coordinate immune responses.
How does the immune system distinguish between self and non-self? Cells have surface markers (MHC proteins) that help immune cells recognize which cells belong to the body and which are foreign.
Created by: user-1929025
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