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What is the collection of organs, cells, tissues, and molecules that mediate the immune response called?
What is the collection of organs, cells, tissues, and molecules that mediate the immune response called?
Immune system
What does immunity refer to?
What does immunity refer to?
The body's specific protective response to foreign agents or organisms.
Which components are part of the immune system? (Select all that apply)
Which components are part of the immune system? (Select all that apply)
Where are white blood cells produced?
Where are white blood cells produced?
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What role do antibodies play in the immune system?
What role do antibodies play in the immune system?
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What is the lymphatic system responsible for?
What is the lymphatic system responsible for?
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The spleen is a blood-filtering organ that does not contain white blood cells.
The spleen is a blood-filtering organ that does not contain white blood cells.
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Which cells are involved in natural immunity?
Which cells are involved in natural immunity?
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The ________ system helps in clearing pathogens from the body.
The ________ system helps in clearing pathogens from the body.
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Study Notes
Immune System Overview
- Composed of organs, cells, tissues, and molecules that mediate immune responses against pathogens like bacteria, viruses, fungi, and toxins.
- Functions as a protective barrier to external invaders.
Immunity Definition
- Body's specific protective response to foreign agents, crucial for resisting infectious diseases.
Components of the Immune System
- White Blood Cells (WBC): Essential for immune defense, produced in bone marrow, patrol the body for invaders.
- Antibodies: Proteins that identify and neutralize microbes and toxins by targeting antigens.
- Complement System: Small proteins produced by the liver that enhance the effectiveness of antibodies in clearing pathogens.
- Lymphatic System: Network of vessels managing body fluids, responding to infections, and transporting immune cells.
- Spleen: Filters blood, removing microbes, damaged RBCs, and producing antibodies and lymphocytes.
- Bone Marrow: Spongy tissue, produces red blood cells (RBCs), platelets, and lymphocytes vital for immune function.
- Thymus: Gland where T-cells mature, playing a key role in immune responses.
White Blood Cells
- Lymphocytes: Types include B-cells, T-cells, and natural killer cells, crucial for detecting and attacking pathogens.
Antibodies
- Induced by antigens, mark invaders for destruction and engage various immune cells and chemicals to combat infections.
Complement System
- Assists antibodies and phagocytotic cells, crucial for pathogen clearance.
Lymphatic System Functions
- Manages body fluid levels, reacts to infections, absorbs dietary fats, and filters out harmful substances through lymph nodes.
Spleen Functions
- Red Pulp: Destroys old, damaged RBCs.
- White Pulp: Contains lymphocytes for immune responses, filters blood for pathogens.
Other Body Defenses
- Skin: Acts as a waterproof barrier, secretes oil with antibacterial properties.
- Lungs: Use mucous and cilia to trap and expel foreign particles.
- Digestive Tract: Mucous lining contains antibodies, with stomach acids capable of killing many microbes.
- Body Fluids: Includes skin oils, saliva, and tears with antibacterial enzymes.
Types of Immunity
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Natural Immunity: First line of defense post-antigen exposure, operates without prior exposure memory.
- Involves cytokines, effector molecules, and cells like monocytes, macrophages, dendritic cells, and natural killer cells.
- Activates other cells to control pathogens and promote immune development.
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Description
Explore the fascinating world of immunity in this quiz, where you'll learn about the collection of organs, cells, tissues, and molecules that mediate the immune response. Discover how the body protects itself from outside invaders such as bacteria, viruses, fungi, and toxins.
