Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 45, Problem 7TYU
Summary Introduction
Introduction: Antibodies, also known as immunoglobulins are Y-shaped proteins that are produced in the body to fight against the antigens that are the foreign substances. There are mainly five types of antibody: IgG, IgM, IgA, IgE, and IgD.
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Human immune system
a) Pathogen-associated molecular patterns are conserved molecular structures produced by microorganisms, but not by host cells.
b) A virus-infected host cell that displays a viral antigen via MHC class I molecules may become a target of cytotoxic T cells.
c) Secreted MHC Class I proteins present in blood plasma can function as opsonins.
d) Both (a) and (b) are correct and (c) is incorrect
e) Statements (a), (b) and (c) are all correct
The major histocompatibility complex (MHC) (a) consists of Y-shaped molecules (b) encodes certain antibodies (c) encodes Toll-like receptors (d) inhibits complement release from macrophages (e) encodes a group ofcell-surface proteins.
Vaccination increases the number of(A) different receptors that recognize a pathogen.(B) lymphocytes with receptors that can bind to the pathogen.(C) epitopes that the immune system can recognize.(D) MHC molecules that can present an antigen
Chapter 45 Solutions
Biology (MindTap Course List)
Ch. 45.1 - Prob. 1LOCh. 45.1 - Compare, in general terms, the immune responses...Ch. 45.1 - Prob. 1CCh. 45.1 - In general, how are vertebrate immune responses...Ch. 45.2 - Describe innate immune responses, including...Ch. 45.2 - Prob. 1CCh. 45.2 - Prob. 2CCh. 45.2 - Prob. 3CCh. 45.2 - VISUALIZE Draw a diagram illustrating the main...Ch. 45.3 - Prob. 4LO
Ch. 45.3 - Prob. 5LOCh. 45.3 - How are cell-mediated immunity and...Ch. 45.3 - Prob. 2CCh. 45.3 - Prob. 3CCh. 45.4 - Describe the sequence of events in cell-mediated...Ch. 45.4 - Prob. 1CCh. 45.5 - Summarize the sequence of events in...Ch. 45.5 - Prob. 8LOCh. 45.5 - Prob. 9LOCh. 45.5 - Prob. 10LOCh. 45.5 - Prob. 1CCh. 45.5 - Prob. 2CCh. 45.5 - Prob. 3CCh. 45.5 - Prob. 4CCh. 45.6 - Prob. 11LOCh. 45.6 - Describe examples of hypersensitivity, including...Ch. 45.6 - Prob. 1CCh. 45.6 - Prob. 2CCh. 45.6 - Prob. 3CCh. 45.6 - Prob. 4CCh. 45.6 - What is the immunological basis for graft...Ch. 45 - Innate immune responses include all but (a)...Ch. 45 - Cytokines (a) are regulatory Toll-like receptors...Ch. 45 - Which of the following is not an action of...Ch. 45 - Prob. 4TYUCh. 45 - Prob. 5TYUCh. 45 - Prob. 6TYUCh. 45 - Prob. 7TYUCh. 45 - Prob. 8TYUCh. 45 - Prob. 9TYUCh. 45 - Which sequence most accurately describes...Ch. 45 - VISUALIZE Label the following diagram and explain...Ch. 45 - Specificity, diversity, and memory are key...Ch. 45 - Prob. 13TYUCh. 45 - PREDICT A playmate in kindergarten exposes John...Ch. 45 - Prob. 15TYUCh. 45 - Prob. 16TYU
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- 1. How does the thymus help the body avoid autoimmune responses? (A) By negatively selecting T cells with receptors that bind to peptide-MHC complexes with high affinity. (B) By positively selecting T cells with receptors that only recognize self peptides. (C) By facilitating cell signaling between T cell surface receptors and antigens in the thymic capsule. (D) By using clonal deletion to eliminate antigen-presenting cells that have low affinity for T cells receptors. 2. Functions of the innate immune system include all of these EXCEPT: (A) to eliminate pathogens directly. (B) to mediate the inflammatory response. (C) to activate the adaptive immune system. (D) All of these are functions of the innate immune system.arrow_forwardInterferons are: (a) Cytokine barriers (b) Physical barriers (c) Cellular barriers (d) Physiological barriersarrow_forwardA 23 year old woman has a boil on the hand from which a gram-positive bacteria was isolated. What role does complement play in the resolution of this infection? (a) Lyse the bacteria (b) attracts neutrophils (c) stimulates T cells (d) promotes immunoglobulin class switcharrow_forward
- Which of the following is NOT true of Innate Lymphoid Cells (ILCs)? A) Each ILC type responds to a different category of pathogens. b.)) ILCs are derived from the common lymphoid precursor. c. )) ILCs rearrange their antigen receptors in a similar way to T-cells. d. ))Each ILC type is distinguished by the cytokines that it produces. e. ))Development of each ILC type is driven by unique transcription factors.arrow_forwardWhich of the following statements is not true?(A) An antibody has more than one antigen-binding site.(B) A lymphocyte has receptors for multiple differentantigens.(C) An antigen can have different epitopes.(D) A liver or muscle cell makes one class of MHC molecule.arrow_forwardThe brain can sense cytokines released by peripheral immune cells through the following means EXCEPT a.) Cytokines being transported across the blood-brain barrier b.) Cytokines crossing intact blood-brain barrier by diffusion c.) Cytokines circumventing blood-brain barrier at circumventricular organs d.) Cytokines activating general visceral sensory nervesarrow_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_forwardWhich statement(s) is/are false regarding B cells? A) O They represent cell-mediated immunity portion of the adaptive immune response. B) O They could be activated by cytotoxic T cells. C) O Memory B cells are the antibody producing B cell type. D) O They would respond to cells infected with a virus. E) O All of the above are false.arrow_forwardWhich of the following among A-D is not a characteristic of T cells? A) O Cytotoxic T cells can kill vius-infected cells. 111 B) O Cytotoxic T cells respond to antigen bound to MHC class I molecules, 0 O Certain T helper cells bind to and activate macrophages and dendritic cells. D) O Certain T helper cells activate B cells for antibody production. E) O All the above are characteristics of T cells.arrow_forward
- All of the following cells directly incorporate antigens into their structures, EXCEPT: A). Antigen presenting cells. B). Helper T cells C). B cells D). Killer T cellsarrow_forwardBoth NK cells and cytotoxic T cells "kill" via the same mechanisms - what are they? Are these cells part of the innate or the adaptive immune system....or both - explain.arrow_forwardWhich of the following is NOT true about T cells?(a) T cells develop from lymphoid stem cells in the bonemarrow and mature in the thymus.(b) Cell-mediated immunity is primarily carried out by Tcells.(c) Subsequent differentiation of T cells produces cytotoxic(killer) T cells, delayed-hypersensitivity T cells, helper Tcells, and regulatory T cells.(d) Natural killer cells (NK) are exclusively differentiated Tcells.(e) T cells act in situations where antigens are embeddedin cell membranes or are inside host cells and thus areinaccessible to antibodies.arrow_forward
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Immune System and Immune Response Animation; Author: Medical Sciences Animations;https://www.youtube.com/watch?v=JDdbUBXPKc4;License: Standard YouTube License, CC-BY
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