Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Question
Chapter 17, Problem 9MCQ
Summary Introduction
Introduction:
The cell mediated immune response is mediated by T lymphocytes, which participates in the phagocytosis, Natural killer cells (NK), formation of cytotoxic T lymphocytes and releases cytokines for antigen response. The main function of the cell mediated immune response is to detect and eliminate the intracellular pathogens by phagocytosis, delayed hypersensitivity, anti-viral immunity, graft rejection and graft versus host disease.
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Students have asked these similar questions
Which 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.
Which of the following statements regarding T cells activated by specific antigen is incorrect?
a. They receive co-stimulatory signals through CD28.
b. They suppress expression of sphingosine 1-phosphate (SIP).
c. They take several days before differentiating into effector T cells.
d. They cease to secrete and respond to interleukin-2 (IL-2).
e. They begin to express CTLA4, which serves to limit T-cell proliferation.
Explain why each choice (a-d) is correct or incorrect.
T cells are differentiated into two groups based on their glycoproteins CD4 or CD8. Which of the following is true of CD4 T cells?
a. They become cytotoxic T cells.
b. The become antigen presenting cells.
c. They become T helper cells.
d. They become plasma cells.
Chapter 17 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 17 - Contrast the terms in the following pairs: a....Ch. 17 - What does MHC stand for? What is the function of...Ch. 17 - Why is dietary protein deficiency associated with...Ch. 17 - Prob. 4RCh. 17 - Prob. 5RCh. 17 - DRAW IT a. In the graph below, at time A the host...Ch. 17 - How would each of the following prevent infection?...Ch. 17 - Prob. 8RCh. 17 - Explain why a person who recovers from a disease...Ch. 17 - Prob. 10R
Ch. 17 - Prob. 1MCQCh. 17 - The type of protection provided by the injection...Ch. 17 - Prob. 3MCQCh. 17 - Prob. 4MCQCh. 17 - Prob. 5MCQCh. 17 - Prob. 6MCQCh. 17 - Prob. 7MCQCh. 17 - Prob. 8MCQCh. 17 - Prob. 9MCQCh. 17 - Prob. 10MCQCh. 17 - Prob. 1ACh. 17 - Why is dietary protein deficiency associated with...Ch. 17 - A positive tuberculin skin test shows cellular...Ch. 17 - On her vacation to Australia, Janet was bitten by...Ch. 17 - Prob. 1CAECh. 17 - Prob. 2CAECh. 17 - A patient with chronic diarrhea was found to lack...Ch. 17 - Newborns (under 1 year) who contract dengue have a...
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- A patient has contracted an upper respiratory infection caused by a virus. Her initial adaptive immune response to the virus is due to what mechanism of immune surveillance?a. The display of viral antigens by naïve B-cells on class I MHC, which is then recognized by helper T-cells that then activate cytotoxic T-cells.b. The display of viral antigens on class I MHC, which is then displayed to sensitized naïve B-cells, leading to the production of antibodies.c. The display of viral antigens on class II MHC by a sensitized naïve B-cell, which is then activated by a helper T-cell primed to the same antigen to begin producing antibodies.d. The display of viral antigens on class I MHC, which is then displayed to helper T-cells, leading to the activation of naïve cytotoxic T-cells.arrow_forwardWhich of the following can serve as antigen-presenting cells (APCs)?a. T cells b. B cells c. macrophages d. dendritic cells e. b, c, and darrow_forwardWhich of the following best describes the movement of a T cell through a lymph node? a. It enters via efferent lymphatics and exits via the bloodstream. b. It enters via afferent lymphatics and exits via the bloodstream. c. It enters via the bloodstream and exits via afferent lymphatics. d. It enters via the bloodstream and exits via the bloodstream. e. It enters via the bloodstream and exits via efferent lymphatics.arrow_forward
- Adaptive immunity includes both humoral and cell-mediated immune responses, which interact but also have distinct roles in adaptive immunity. Identify the example of a strictly cell-mediated immune response. A. A cytotoxic T cell destroys an infected host cell. B. A helper T cell activates a B cell. C. A B cell gives rise to plasma cells, which release antibodies. D. An antigen is taken in by an antigen-presenting cell.arrow_forwardWhich of the following pairs is mismatched? a. plasma cell: mediation of phagocytosis and killing of microorganisms in the plasma b. megakaryocyte: formation of platelets c. dendritic cell: activation of adaptive immune responses d. natural killer cell: develops from a common lymphoid progenitor e. neutrophil: formation of pus f. regulatory T cell: inhibition of T-cell activity.arrow_forwardWhich of the following is TRUE regarding Gram negative bacteria? a- Their cell wall is composed of a large proportion of sugars b- Their cell wall does not absorb the Gram stain and turns pink c- Their cell wall is composed of a small proportion of peptidoglycan d- Two of the above statements are true Which T-lymphocytes activate the B-cell response? 1- suppressor T-cells. 2- cytotoxic T-cells. 3- helper T-cells. 4- memory T-cells. Substances that are injected containing an antigen to stimulate the immune system to respond are called a- antibodies b- medications. c- vaccines d- antibioticsarrow_forward
- Which of the following statements about T cells is false? a. Helper T cells release cytokines while cytotoxic T cells kill the infected cell. b. Helper T cells are CD4+, while cytotoxic T cells are CD8+. c. MHC II is a receptor found on most body cells, while MHC I is a receptor found on immune cells only. d. The T cell receptor is found on both CD4+ and CD8+ T cells.arrow_forwardActivated helper T Cells participate in which of the following processes? a.) Differentiation of memory B cells b.) Activation of cytotoxic T Cells c.) Facilitation of macrophage phagocytosis d.) All of abovearrow_forwardWhich of the following is a characteristic of a cytotoxic T cell? Question 7 options: A) They originate in bone marrow. B) They have antibodies on their surfaces. C) They are responsible for the memory response. D) They recognize antigens associated with MHC I.arrow_forward
- Which of the following statements regarding intraepithelial lymphocytes is false? (Select all that apply.) a. They comprise approximately 10% of the cells in the mucosal epithelium. b. They are composed of both CD4 and CD8 T cells. c. They are separated from the lamina propria by a basement membrane. d. They are activated effector T cells with a narrow range of antigen specificities. e. They do not include NK cells. f. They express the α4:β7 integrin that binds to E-cadherin on epithelial surfaces.arrow_forwardThe 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.arrow_forwardin antibody-mediated immunity, what happens immediately after B cells are activated? a. the foreign antigen-MHC complex is displayed on the cell surfaces. b. activated T helper cells interact with the B cells. c. the B cells are cloned. D. antibodies combine with antigens on the pathogen surface.arrow_forward
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