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Questions and Answers
What is the primary function of the immune system?
What is the primary function of the immune system?
- To facilitate digestion
- To produce hormones
- To guard against disease and tissue damage (correct)
- To regulate body temperature
Which of the following is NOT a function of the immune system?
Which of the following is NOT a function of the immune system?
- Defense against microorganisms
- Surveillance of abnormal body cells
- Removal of damaged tissue
- Production of hormones (correct)
Where are immune cells highly concentrated in the body?
Where are immune cells highly concentrated in the body?
- Brain and spinal cord
- Skin and hair
- Blood and lymphatic tissue (correct)
- Muscles and bones
What is the name of the organ where immune cells mature?
What is the name of the organ where immune cells mature?
What is the term for the process by which the immune system identifies and destroys abnormal body cells?
What is the term for the process by which the immune system identifies and destroys abnormal body cells?
Which of the following is NOT a component of the immune system?
Which of the following is NOT a component of the immune system?
What is the primary function of the lymph nodes?
What is the primary function of the lymph nodes?
What is the main function of the spleen?
What is the main function of the spleen?
What is the percentage of white blood cells in total blood volume?
What is the percentage of white blood cells in total blood volume?
What is the function of the thymus?
What is the function of the thymus?
What is the primary function of neutrophils?
What is the primary function of neutrophils?
What is the role of macrophages in the immune system?
What is the role of macrophages in the immune system?
What is the role of lymphatic vessels?
What is the role of lymphatic vessels?
What is the function of MALT?
What is the function of MALT?
Study Notes
Immune System Introduction
- The Immune System helps to guard against disease and tissue damage.
- Immune cells are distributed throughout the body, but are highly concentrated in blood and lymphatic tissue.
Functions of the Immune System
- Defense: protects against invading microorganisms.
- Clean up: removes damaged tissue.
- Surveillance: identifies and destroys abnormal body cells.
Lymphoid Tissue
- Bone Marrow: site of white blood cell production.
- Lymphatic Vessels: carry lymph from tissues to lymph nodes and lymph organs before returning to blood.
- Lymph Nodes, Tonsils, MALT, Appendix: collections of lymphocytes for immune response and macrophages to remove debris.
- Spleen: replaces worn out blood cells, collections of lymphocytes for immune response and macrophages to remove debris.
- Thymus: site of T-lymphocyte (T-cell) maturation.
White Blood Cells (Leukocytes)
- Make up less than 1% of total blood volume.
- General Functions: major cells of the Immune System's internal defense against foreign cells, remove debris, destroy cancer cells.
- 5 types:
- Neutrophils
- Lymphocytes
- Monocytes
- Eosinophils
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Description
Learn about the immune system, including innate and adaptive immunity, external defenses, and cell-mediated immunity.
