Textbook Question
How does a cytotoxic T cell destroy another cell displaying antigens bound to class I MHC proteins?
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Ch. 22 The Lymphatic System and Immunity
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
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Martini, Nath, Bartholomew 11th EditionCh. 22 The Lymphatic System and ImmunityProblem 22
Martini, Nath, Bartholomew 11th EditionCh. 22 The Lymphatic System and ImmunityProblem 22Chapter 22, Problem 22
How does the formation of an antigen–antibody complex cause the elimination of an antigen?
Verified step by step guidance1
Understand that an antigen–antibody complex forms when antibodies specifically bind to antigens, which are foreign molecules or pathogens recognized by the immune system.
Recognize that the binding of antibodies to antigens can neutralize the antigen by blocking its active sites, preventing it from interacting with host cells.
Know that the antigen–antibody complex can also agglutinate (clump) antigens together, making it easier for immune cells to identify and remove them.
Learn that the complex activates the complement system, a group of proteins that can puncture the membrane of pathogens, leading to their destruction.
Finally, understand that the antigen–antibody complex facilitates phagocytosis, where immune cells like macrophages and neutrophils engulf and digest the antigen, effectively eliminating it from the body.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Antigen–Antibody Complex Formation
An antigen–antibody complex forms when antibodies specifically bind to antigens on pathogens or foreign substances. This binding is highly specific, involving the antibody’s variable region recognizing unique antigenic determinants, which marks the antigen for immune response.
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9:16
Outcomes of Antibody Binding to Antigen
Opsonization and Phagocytosis
The antigen–antibody complex acts as a signal for immune cells, such as macrophages and neutrophils, to engulf and destroy the antigen. Antibodies coat the antigen, enhancing its recognition and ingestion by phagocytes, a process called opsonization.
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8:57Steps of Phagocytosis
Activation of the Complement System
The antigen–antibody complex can activate the complement cascade, a series of proteins that promote inflammation, attract immune cells, and directly lyse pathogens. This amplifies the immune response and facilitates the elimination of the antigen.
Recommended video:
4:25Complement System
Related Practice
Textbook Question
An investigator at a crime scene discovers some body fluid on the victim's clothing. The investigator carefully takes a sample and sends it to the crime lab for analysis. On the basis of the analysis of antibodies, could the crime lab determine whether the sample is blood plasma or semen? Explain.
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Textbook Question
Skin tests are used to determine if a person
(a) Has an active infection
(b) Has been exposed to a particular antigen
(c) Carries a particular antigen
(d) Has measles
(e) Can produce antibodies
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Textbook Question
An anesthesia technician is advised that she should be vaccinated against hepatitis B, which is caused by a virus. She is given one injection and is told to come back for a second injection in a month and a third injection after 6 months. Why is this series of injections necessary?
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Textbook Question
Compare and contrast the effects of complement with those of interferon.
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Textbook Question
Give one example of each type of immunity: innate immunity, naturally acquired active immunity, artificially acquired active immunity, artificially acquired passive immunity, and naturally acquired passive immunity.
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