Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 21, Problem 17RQ
The elimination of self-reactive thymocytes is called ________.
- positive selection.
- negative selection
- tolerance.
- clonal selection.
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Chapter 21 Solutions
Anatomy & Physiology
Ch. 21 - Visit this website...Ch. 21 - Visit this website...Ch. 21 - Visit this website...Ch. 21 - Immunity can be acquired in an active or passive...Ch. 21 - Which of the following cells is phagocytic? plasma...Ch. 21 - Which structure allows lymph from the lower right...Ch. 21 - Which of the following cells is important hi the...Ch. 21 - Which of the following cells would be most active...Ch. 21 - Which of the lymphoid nodules is most likely to...Ch. 21 - Which of the following signs is not characteristic...
Ch. 21 - Which of the following is not important in the...Ch. 21 - Enhanced phagocytosis of a cell by the binding of...Ch. 21 - Which of the following leads to the redness of...Ch. 21 - T cells that secrete cytokines that help antibody...Ch. 21 - The taking in of antigen and digesting it for...Ch. 21 - Why is clonal expansion so important? to select...Ch. 21 - The elimination of self-reactive thymocytes is...Ch. 21 - Which type of T cell is most effective against...Ch. 21 - Removing functionality from a B cell without...Ch. 21 - Which class of antibody crosses the placenta in...Ch. 21 - Which class of antibody has no known function...Ch. 21 - When does class switching occur? primary response...Ch. 21 - Which class of antibody is found in mucus? IgM IgA...Ch. 21 - Which enzymes in macrophages are important for...Ch. 21 - What type of chronic lung disease is caused by a...Ch. 21 - Which type of immune response is most directly...Ch. 21 - What is the reason that you have to be immunized...Ch. 21 - Which type of immune response works in conceit...Ch. 21 - Which type of hypersensitivity involves soluble...Ch. 21 - What causes the delay in delayed hypersensitivity?...Ch. 21 - Which of the following is a critical feature of...Ch. 21 - Which of the following is an autoimmune disease of...Ch. 21 - What drug is used to counteract the effects of...Ch. 21 - Which of the following terms means many genes?...Ch. 21 - Why do we have natural antibodies? We dont know...Ch. 21 - Which type of cancer is associated with HIV...Ch. 21 - How does cyclosporine A work? suppresses...Ch. 21 - What disease is associated with bone marrow...Ch. 21 - Describe the flow of lymph from its origins in...Ch. 21 - Describe the process of inflammation in an area...Ch. 21 - Describe two early induced responses and what...Ch. 21 - Describe the processing and presentation of an...Ch. 21 - Describe clonal selection and expansion.Ch. 21 - Describe how secondary B cell responses are...Ch. 21 - Describe the role of IgM in immunity.Ch. 21 - Describe how seroconversion works in HIV disease.Ch. 21 - Describe tuberculosis and the innocent bystander...Ch. 21 - Describe anaphylactic shock in someone sensitive...Ch. 21 - Describe rheumatic fever and how Tolerance is...Ch. 21 - Describe how stress affects immune responses.
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- The elimination of self-reactive thymocytes is called________.a. positive selection.b. negative selection.c. tolerance.d. clonal selectionarrow_forwardWhy is innate immunity referred to as nonspecific? Group of answer choices because it provides defense against a wide range of pathogens because it is a form of defense that functions in all human body systems because it is a form of defense found in all animal species because it provides a built-in mechanism of defense that does not require "training"arrow_forwardThe humoral immune response depends on which cells? a. TC cells b. B cells c. B and TH cells d. TC and TH cellsarrow_forward
- Which statement is true? is it both true? or is it both incorrect? Statement 1: Major histocompatibility complex proteins help the immune system recognize 'self' vs 'non-self'. Statement 2: Self immunity refers to the ability of the immune system to recognize foreign antigens.arrow_forwardWhich of these is an incorrect description of either the adaptive or innate immune responses? Innate immunity involves both surface barriers and internal defenses. Only adaptive immunity involves defense against a specific foreign invader. Inflammation is an innate immune response but not an adaptive immune response. Chemicals are involved in adaptive immunity but not innate immunity. Immune system cells play a role in both innate and adaptive immune responses.arrow_forwardWhich type of immune response is most directlyeffective against bacteria?a. natural killer cellsb. complementc. cytotoxic T cellsd. helper T cellsarrow_forward
- The difference between innate immunity and adaptive immunity is that adaptive immunity attacks pathogens; innate immunity attacks microbes. innate immunity is fast and generalized; adaptive immunity is slow and specific. adaptive immunity releases cytokines; innate immunity produces antibodies. innate immunity targets cancers and transplants; adaptive immunity targets viruses and bacteria.arrow_forward________________ immunity is a type of adaptive immunity that results in antibody release, while__________________immunity is a type of adaptive immunity that results in extraceullar killng.arrow_forwardWhich one of the following acts as the “alarm signal” to activate the body’s adaptive immune system by stimulating helper T cells? a. B cells b. Interleukin-1 c. Complement d. Histaminesarrow_forward
- The ability to develop a secondary immune response is based on ______. a. memory cells b. circulating antibodies c. plasma cells d. effector cytotoxic T cells e. mast cellsarrow_forwardFigure 42.11 Which of the following statements about T cells is false? Helper T cells release cytokines while cytotoxic T cells kill the infected cell. Helper T cells are CD4+, while cytotoxic T cells are CD8+. MHC II is a receptor found on most body cells, while MHC I is a receptor found on immune cells only. The T cell receptor is found on both CD4+ and CD8+ T cells.arrow_forwardWhich of the following is not a part of innate immunity? a. phagocytic cells e. inflammation b. fever f. complement activation c. histamines g. presenting antigen d. cytokines h. all take partarrow_forward
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