FREE Anatomy and Physiology Lymphatic and Immune Systems Questions and Answers
What is the main function of the lymphatic system?
The lymphatic system collects and returns interstitial fluid to the blood, absorbs fats from the digestive tract, and is a critical part of the immune system, housing lymphocytes that defend against pathogens.
Which organ is the primary site for T-cell maturation?
T-cells mature in the thymus, where they are educated to recognize self and non-self cells. Bone marrow produces T-cell precursors, but maturation occurs in the thymus.
Which of the following cells are part of the body's innate immune system?
NK cells are part of the innate immune system and attack infected or cancerous cells without the need for prior exposure. B and T cells belong to the adaptive immune system, and plasma cells are antibody-secreting B cells.
What is the role of the spleen in the lymphatic system?
The spleen filters the blood, removes old or damaged red blood cells, and provides an environment for immune cells to respond to blood-borne pathogens.
What is an antibody?
Antibodies are proteins secreted by activated B cells (plasma cells) that bind to specific antigens, neutralize pathogens, and mark them for destruction by other immune cells.