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What steps are required for most B cells to become fully activated and differentiate into plasma cells?
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Ch. 48 - The Immune System in Animals
Freeman8th EditionBiological ScienceISBN: 9780138276263
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TOC.tableOfContents
- Ch. 1 - Biology: The Study of Life13
- Ch. 2 - Water and Carbon: The Chemical Basis of Life14
- Ch.3 - Protein Structure and Function10
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells11
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation11
- Ch. 10 - Photosynthesis12
- Ch. 11 - Cell-Cell Interactions12
- Ch. 12 - The Cell Cycle8
- Ch. 13 - Meiosis12
- Ch. 14 - Mendel and the Gene23
- Ch. 15 - DNA and the Gene: Synthesis and Repair15
- Ch. 16 - How Genes Work16
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria16
- Ch. 19 - Control of Gene Expression in Eukaryotes12
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers15
- Ch. 21 - Genes, Development, and Evolution12
- Ch. 22 - Evolution by Natural Selection16
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea15
- Ch. 27 - Diversification of Eukaryotes16
- Ch. 28 - Green Algae and Land Plants16
- Ch. 29 - Fungi18
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals15
- Ch. 32 - Deuterostome Animals17
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function17
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development16
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology15
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology17
- Ch. 54 - Biodiversity and Conservation Ecology18
Freeman8th EditionBiological ScienceISBN: 9780138276263Non è quello che usi tu?Cambia libro di testo
Capitolo 48, Problema 9
Which of the following outcomes would be expected if somatic hypermutation did not occur?
a. The diversity of pattern-recognition receptors would be significantly lowered.
b. B and T lymphocytes would not be able to produce receptors that recognize antigens.
c. The adaptive immune response would not be activated by pathogens.
d. The secondary immune response to a repeat infection would produce the same antibodies as those made in the primary immune response.
Guida verificata passo dopo passo1
Understand the role of somatic hypermutation: It is a process that occurs in B cells during an immune response, leading to the production of antibodies with increased affinity for their specific antigen.
Recognize that somatic hypermutation contributes to the diversity and specificity of antibodies, allowing the immune system to adapt and respond more effectively to pathogens.
Consider the options: a. Pattern-recognition receptors are part of the innate immune system and are not affected by somatic hypermutation, so this option is incorrect. b. B and T lymphocytes can still produce receptors without somatic hypermutation, but these receptors would not have increased affinity, so this option is incorrect. c. The adaptive immune response can still be activated without somatic hypermutation, but it would be less effective, so this option is incorrect.
Evaluate option d: Without somatic hypermutation, the secondary immune response would not produce antibodies with higher affinity than those produced in the primary response, leading to the same antibodies being produced.
Conclude that the correct outcome if somatic hypermutation did not occur is option d, as the secondary immune response would not improve in terms of antibody affinity compared to the primary response.
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Somatic Hypermutation
Somatic hypermutation is a cellular mechanism in B cells that introduces mutations at a high rate in the variable regions of immunoglobulin genes. This process occurs after B cell activation and is crucial for the diversification of antibodies, allowing the immune system to adapt and improve its response to specific antigens over time.
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04:06
Helper T Cells and B Cells
Adaptive Immune Response
The adaptive immune response is a highly specific defense mechanism that involves the activation of lymphocytes (B and T cells) in response to pathogens. It is characterized by its ability to remember past infections, leading to a more rapid and effective response upon re-exposure to the same pathogen, primarily through the production of specific antibodies and memory cells.
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05:50Adaptive Immune Response
Secondary Immune Response
The secondary immune response is the immune system's reaction to a previously encountered antigen. It is faster and more robust than the primary response due to the presence of memory B and T cells. These cells quickly recognize the antigen and produce a more effective and higher affinity antibody response, often preventing reinfection or reducing the severity of the disease.
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06:14Primary and Secondary Immunity
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