Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 37.8, Problem 1TC
What might be the evolutionary advantage of allergic reactions? (Hint; Are there harmful substances or organisms that might provoke allergic reactions?)
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Why would humans and other mammals evolve an allergic response that causes suffering, tissue damage, and even death?
Which of the following is not a symptom of an allergic reaction?
Group of answer choices
Asthma or wheezing
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Irritated or reddened eyes
Tingling sensation in the mouth and tongue
Sudden increase in blood pressure
Some primitive organisms, such as invertebrates, have no lymphocytes and thus lack an adaptive immune system, but they have somecomponents of an innate immune system, including phagocytes andcertain protective proteins. What are some general features of innateimmunity that make it very valuable to organisms lacking more specific antibody- and cell-mediated responses? What are some disadvantages to having only an innate immune system?
Chapter 37 Solutions
Biology
Ch. 37.1 - compare and contrast the terms microbe and...Ch. 37.1 - Prob. 2CYLCh. 37.2 - Prob. 1TCCh. 37.2 - If phagocytes kill most species of bacteria that...Ch. 37.2 - describe the external barriers to Infection,...Ch. 37.2 - Prob. 2CYLCh. 37.3 - Prob. 1CYLCh. 37.3 - Prob. 2CYLCh. 37.4 - Prob. 1TCCh. 37.4 - Prob. 1CYL
Ch. 37.4 - Prob. 2CYLCh. 37.4 - Prob. 3CYLCh. 37.5 - Prob. 1CYLCh. 37.5 - Prob. 2CYLCh. 37.6 - Prob. 1CYLCh. 37.6 - Prob. 2CYLCh. 37.7 - Prob. 1HYEWCh. 37.7 - Prob. 1TCCh. 37.7 - explain how antibiotics, antiviral drugs, and...Ch. 37.7 - Prob. 2CYLCh. 37.8 - What might be the evolutionary advantage of...Ch. 37.8 - Prob. 1CYLCh. 37.9 - Prob. 1CYLCh. 37.9 - describe current medical treatments against...Ch. 37.9 - Prob. 1CTCh. 37 - Prob. 1MCCh. 37 - Prob. 2MCCh. 37 - Molecules that label your cells as self are a....Ch. 37 - Prob. 4MCCh. 37 - The immune system usually does not attack your...Ch. 37 - External defenses against microbial invasion...Ch. 37 - Prob. 2FIBCh. 37 - Prob. 3FIBCh. 37 - Prob. 4FIBCh. 37 - Prob. 5FIBCh. 37 - Prob. 6FIBCh. 37 - Prob. 1RQCh. 37 - Prob. 2RQCh. 37 - Describe humoral immunity and cell-mediated...Ch. 37 - Prob. 4RQCh. 37 - Prob. 5RQCh. 37 - Prob. 6RQCh. 37 - Prob. 7RQCh. 37 - What are memory cells? How do they contribute to...Ch. 37 - Prob. 9RQCh. 37 - Prob. 10RQCh. 37 - Prob. 11RQCh. 37 - Prob. 12RQCh. 37 - Prob. 13RQCh. 37 - Why is it essential that antibodies and T-cell...Ch. 37 - Prob. 2AC
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- Explain how dendritic cells or B cells can express six different versions of MHC1 and six to eight versions of MHC2. What is the evolutionary benefit of MHC being highly polymorphic and polygenic? thank you!arrow_forwardAn experiment is performed in a mice and studies have indicated that Batf3-/- mice lack one particular subset of conventional dendritic cells, known as CD8a+ dendritic cells (DC), but otherwise appear to have normal numbers and subsets of all other immune cell populations (e.g., T cells, B cells, macrophages, etc.). The results of this experiment are shown in the figure below. Name two possible functions of CD8a+ dendritic cells that could account for the results seen in the Batf3-/- mice immunized with WNV.arrow_forwardThe entry of naive T cells from the blood into lymph nodes and mucosal lymphoid tissues occurs by a process that involves similar steps and similar adhesion molecules to the process by which leukocytes are recruited into sites of inflammation. Yet naive T cells do not enter tissues at sites of inflammation, but rather, home to lymphoid tissues. Which class of adhesion molecules direct the specific homing of naive T cells to lymphoid tissues?arrow_forward
- Organ Transplants Must Be Immunologically In the human HLA system there are 23 HLA-A alleles, 47 for HLA-B, 8 for HLA-C, 14 for HLA-DR, 3 for HLA-DQ, and 6 for HLA-DP. How many different human HLA genotypes are possible?arrow_forwardA hypothetical disorder prevents memory cells from forming. What effect would this have on the immune system? B lymphocytes would be affected, but not T lymphocytes, Vaccinations would no longer be useful, The inflammatory response would no longer be effective, or The adaptive immune response would cease to function, but the innate immune response would continue to function normally.arrow_forwardThe innate immune system has to be able to detect foreign invaders. Explain two ways that the innate immune system is able to detect these foreign invaders to allow a response to be mounted.arrow_forward
- Explain the mechanism by which (A) macrophages and NK cells, and (B) macrophages and effector T cells become mutually activated in the course of an innate and adaptive immune response, respectively. (C) Which gene defects would impair these mutual activation processes?arrow_forwardThe basis of all allergic responses lies with the production of ______ by _______. A) antibodies, T cells B) histamine, mast cells C) histamine, B cells D) complement, B cellsarrow_forwardWhen T cells are activated by recognizing peptide:MHC complexes on dendritic cells in the lymph node, they up-regulate the receptor CD69. For T cells expressing a given T-cell receptor, the initial strength of the T-cell receptor signal can be modulated by varying the number of peptide:MHC complexes on the dendritic cells, or by varying the affinity with which the T cell-receptor binds to the peptide:MHC complexes. As a result, T cells stimulated with stronger T-cell receptor signals will maintain high expression of CD69 for one or two days longer that if those same T cells were stimulated with weaker T-cell receptor signals. Therefore, T cells stimulated with weaker T-cell receptor signals are likely to: Die by apoptosis Undergo more rounds of proliferation that T cells stimulated with stronger T-cell receptor signals Migrate to the B-cell zones of the lymph node Have reduced effector functions, such as cytokine production Egress from the lymph node 1–2 days earlier than T cells…arrow_forward
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