Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Chapter 20, Problem 8MC
Cells that can directly attack target cells include all of the following except(a) macrophages, (b) cytotoxic T cells, (c) helper T cells, (d) natural killer cells.
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Perforins are destructive proteins associated with the activity of, (a) T cells. (b) B cells. (c) macrophages. (d) plasma cells.
T cells and B cells can be activated only by, (a) pathogenic microorganisms.(b) interleukins, interferons, and colony-stimulating factors. (c) cells infected with viruses, bacterial cells, or cancer cells. (d) exposure to a specific antigen bound to a MHC protein on a plasma membrane.
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 cells
Chapter 20 Solutions
Anatomy & Physiology (6th Edition)
Ch. 20.1 - What distinguishes the innate defense system from...Ch. 20.1 - What is the first line of defense against disease?Ch. 20.2 - What is opsonization and how does it help...Ch. 20.2 - Under what circumstances might NK cells kill our...Ch. 20.2 - What are the cardinal signs of inflammation and...Ch. 20.3 - Name three key characteristics of adaptive...Ch. 20.3 - What is the difference between a complete antigen...Ch. 20.3 - What marks a cell as self as opposed to nonselfCh. 20.4 - What event (or observation) signals that a B or T...Ch. 20.4 - Which of the following T cells would survive...
Ch. 20.4 - Prob. 11CYUCh. 20.4 - In clonal selection, who does the selecting? What...Ch. 20.5 - Why is the secondary response to an antigen so...Ch. 20.5 - Prob. 14CYUCh. 20.5 - Which class of antibody is most abundant in blood?...Ch. 20.5 - List four ways in which antibodies can bring about...Ch. 20.5 - Prob. 17CYUCh. 20.6 - Class II MHC proteins display what kind of...Ch. 20.6 - Which type of T cell is the most important in both...Ch. 20.6 - Describe the killing mechanism of cytotoxic T...Ch. 20.7 - Prob. 21CYUCh. 20.7 - Prob. 22CYUCh. 20 - All of the following are considered innate body...Ch. 20 - The process by which neutrophils squeeze through...Ch. 20 - Antibodies released by plasma cells are involved...Ch. 20 - Which of the following antibodies can fix...Ch. 20 - Which antibody class is abundant in body...Ch. 20 - Small molecules that must combine with large...Ch. 20 - Lymphocytes that develop immunocompetence in the...Ch. 20 - Cells that can directly attack target cells...Ch. 20 - Prob. 9MCCh. 20 - The cell type most often invaded by HIV is a(n)...Ch. 20 - Complement fixation promotes all of the following...Ch. 20 - Using the letters from column B, match the cell...Ch. 20 - Besides acting as mechanical barriers, the skin...Ch. 20 - Explain why attempts at phagocytosis are not...Ch. 20 - What is complement? How does it cause bacterial...Ch. 20 - Interferons are referred to as antiviral proteins....Ch. 20 - Differentiate between humoral and cellular...Ch. 20 - Although the adaptive immune system has two arms,...Ch. 20 - Define immunocompetence and self-tolerance. How is...Ch. 20 - Differentiate between a primary and a secondary...Ch. 20 - Prob. 21SAQCh. 20 - What is the role of the variable regions of an...Ch. 20 - Name the five antibody classes and describe where...Ch. 20 - How do antibodies help defend the body?Ch. 20 - Do vaccines produce active or passive humoral...Ch. 20 - Prob. 26SAQCh. 20 - Describe the specific roles of helper, regulatory,...Ch. 20 - Prob. 28SAQCh. 20 - Prob. 29SAQCh. 20 - What events can result in autoimmune disease?Ch. 20 - Prob. 1CCSCh. 20 - Prob. 2CCSCh. 20 - Prob. 3CCSCh. 20 - Prob. 4CCSCh. 20 - Remember Mr. Ayers, the bus driver from Chapter...
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- Which of the following lists contains cells that are typically considered to be associated with the innate immune response? Question 14 options: A) neutrophils, macrophages, T cells B) neutrophils, macrophages, NK cells C) B cells, T cells, and NK cells D) basophils, T cells, mast cellsarrow_forwardB cell-receptors differ from T cell-receptors in that ________. A) B cell-receptors are immunoglobulins similar to those that are secreted, whereas T cell-receptors are not immunoglobulins and are never secreted B) T cell-receptors are much smaller than B cell-receptors C) All of the choices reflect differences between B cell- and T cell-receptors. D) B cell-receptors are comprised of four polypeptides, whereas T cell-receptors are made up of two polypeptidesarrow_forwardWhich of the following T cells would survive education in the thymus? (a) one that recognizes neither MHC nor self-antigen, (b) one that recognizes both MHC and self-antigen, (c) one that recognizes MHC but not self-antigen, (d) one that recognizes self-antigen but not MHC.arrow_forward
- Which 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_forwardThe best definition of an antigen is:(a) A foreign molecule in the body(b) A chemical that elicits antibody production and binds tothat antibody(c) A molecule that binds to antibody(d) A pathogen(e) An enzyme that activates B cellsarrow_forwardWhich 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_forward
- Which statement best describes the difference between responses of effector B cells (plasma cells) and those of cytotoxic T cells? (A) B cells confer active immunity;cytotoxic T cells confer passive immunity. (B) B cells respond the first time a pathogen is present; cytotoxic T cells respond subsequent times. (C) B cells secrete antibodies against a pathogen; cytotoxic T cells kill pathogen-infected host cells. (D) B cells carry out the cell-mediated response; cytotoxic T cells carry out the humoral response.arrow_forwardHuman 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 correctarrow_forwardCD4 markers are associated with, (a) cytotoxic cells. (b) regulatory cells. (c) helper T cells. (d) a, b, and c.arrow_forward
- In a normal individual, a T cell that interacts with a self-antigen in the thymus will more than likely undergo what process (which answer is best)? A) apoptosis B) release granules C) activation D) extravasation E) anergyarrow_forward1. 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_forwardWhich of the following destroys virus-infected cells? Question 6 options: A) cytotoxic T cells B) B cells C) T helper cells D) dendritic cellsarrow_forward
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