Textbook Question
Define immunocompetence and self-tolerance. How is self-tolerance achieved?
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Ch. 21 The Immune System: Innate and Adaptive Body Defenses
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732
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Table of contents
- Ch. 1 The Human Body: An Orientation25
- Ch. 2 Chemistry Comes Alive24
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System12
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System25
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System25
- Ch. 13 The Peripheral Nervous System and Reflex Activity30
- Ch. 14 The Autonomic Nervous System16
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart25
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Not the one you use?Change textbook
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Hoehn, Haynes, Abbott 12th EditionCh. 21 The Immune System: Innate and Adaptive Body DefensesProblem 15
Hoehn, Haynes, Abbott 12th EditionCh. 21 The Immune System: Innate and Adaptive Body DefensesProblem 15Chapter 21, Problem 15
Interferons are referred to as antiviral proteins. What stimulates their production, and how do they protect uninfected cells? Which cells of the body secrete interferons?
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Understand that interferons are proteins produced by cells in response to viral infections; their production is stimulated when a cell detects the presence of viral components, such as viral RNA or DNA, inside it.
Recognize that once produced, interferons are secreted and bind to receptors on neighboring uninfected cells, triggering these cells to produce antiviral proteins that inhibit viral replication, thereby protecting them from infection.
Identify that interferons do not directly kill viruses but instead activate cellular mechanisms that interfere with viral replication and enhance the immune response.
Know that various cells can secrete interferons, including virus-infected cells themselves, as well as immune cells such as macrophages, dendritic cells, and lymphocytes.
Summarize that interferons act as signaling molecules alerting nearby cells to the viral threat, enabling a rapid and coordinated antiviral defense across tissues.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Stimuli for Interferon Production
Interferons are produced in response to viral infections. When a cell detects viral components like double-stranded RNA, it triggers the synthesis and release of interferons to alert neighboring cells and initiate an antiviral state.
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Interferons
Mechanism of Interferon Protection
Interferons protect uninfected cells by binding to their surface receptors, activating signaling pathways that induce the expression of antiviral proteins. These proteins inhibit viral replication and enhance immune responses, preventing the spread of infection.
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Cells that Secrete Interferons
Various cells secrete interferons, primarily virus-infected cells, as well as immune cells like macrophages, dendritic cells, and lymphocytes. These cells produce different types of interferons (Type I, II, III) to coordinate the antiviral defense.
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Name the five antibody classes and describe where each is most likely to be found in the body.
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