BROOKER BIOLOGY
5th Edition
ISBN: 9781307656152
Author: BROOKER
Publisher: MCG/CREATE
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Chapter 52, Problem 4TY
Summary Introduction
Introduction: The body contains a well-defined system to protect itself from infections and harmful agents. This system is known as the immunity system. The two types of immunity systems are innate and adaptive immunity. The immunity that an organism contains from the time of birth is called innate immunity. However, the immunity that the organism acquires during its lifetime is called adaptive immunity.
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Which of the following statements is TRUE?
A. Lymphatic vessels and veins have valves
B. All Lymphocytes are part of our Non-specific immune defenses
C. Chicken pox vaccines involve the injection of antibodies
D. Spleens are lymph nodes which drain lymph fluid back to the blood circulation
What do complement proteins, inflammation and fever have in common?
A. All are part of the specific defenses mechanisms of the immune system (also called adaptive immunity)
B. All are processes that occur in lymph nodes
C. All occur as part of the non-specific defenses
D. All occur as a direct result of antigen processing in an antigen processing cell
Explain why each choice (a-d) is correct or incorrect.
A vaccine is effective because
a. The vaccine contains the antibodies necessary to fight infection.
b. The vaccine contains the lymphocytes necessary to fight infection.
c. The secondary response of the adaptive immunity is faster and more efficient than the primary response.
d. B lymphocytes are unable to mount an immune response the first time they are exposed to a new pathogen.
Compare and contrast innate and adaptive immunity by matching the following characteristics with the correct arm of immunity, using I for innate and A for adaptive:
a. Is the first to engage on initial encounter with antigen
b. Is the most pathogen specific
c. Employs T and B lymphocytes
d. Adapts during the response
e. Responds identically during a first and second exposure to the same antigen
f. Responds more effectively during a subsequent exposure
g. Includers a memory component
h. Is the target of vaccination
i. Can involve the use of PAMP receptors
j. Involves antigen-specific receptors binding to pathogens
k. Can be mediated by antibodies
Chapter 52 Solutions
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- Which of the following is not a function of antibodies? Select one: a. They neutralize pathogens by masking the pathogen surface. b. They act as molecular adaptors that bridge together pathogen and phagocyte surfaces. c. They exert toxic effects directly. d. They act as opsonins that mediate phagocytosis. e. They activate complement fixation.arrow_forwardExplain why each choice (a-d) is correct or incorrect. Which statement is true about T cells? a. They usually directly recognize antigens, which then activates a subpopulation of killer cells b. Their proliferation is enhanced by interleukins 1 and 2. c. Once activated, they cannot secrete cytokines. d. They will develop into cytotoxic T cells if antigen is complexed with class II MHC proteins.arrow_forwardAdaptive 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_forward
- Which of these is an example of innate immunity?a. Tears and saliva wash away microorganisms.b. Basophils release histamine and leukotrienes.c. Neutrophils phagocytize a microorganism.d. The complement cascade is activated.e. All of these are correctarrow_forwardThe four characteristics of adaptive immunity include all of the following except a. activation by a specific antigen. b. memory. c. production of clones of cells that have the same TCR or BCR. d. effective against a wide array of pathogens.arrow_forwardAny aspect of the immune system can be deficient. Which of the following deficiencies would primarily affect the BARRIER function of immunity? Group of answer choices A. Complement Deficiencies, in which a variety of complement proteins do not function properly B. DiGeorge Syndrome, in which the thymus does not develop properly C. Selective IgA deficiency, in which IgA antibodies are produced in very low amounts D. Severe Combined Immune Deficiency (SCID), in which all T and B cell functions are absentarrow_forward
- Considering the mechanisms of innate immunity, which of the following pairs is accurately matched? Select one: a. Neutrophils – increase in number in response to bacterial infections b. Complement – slow the spread of viral infections c. Interferons – assist antibodies in the destruction of pathogens d. Eosinophil – recognize abnormal cells, such as cancer cellsarrow_forwardConcerning the adaptive immunity, which of the following statements is CORRECT: a. The adaptive immune response occurs very rapidly b. The adaptive immune response leads to us remembering antigens c. The adaptive immune response occurs mainly in the thymus d. The adaptive immune response is mostly dependent on antibodies e. The adaptive immune response is mostly dependent on the complement cascade 46) Concerning acute inflammation, which of the following statements is INCORRECT: a. localised redness occurs because of hyperaemia b. localised heat occurs because of increased bloodflow c. Release of bradykinins and other inflammatory mediators causes localised paind. swelling occurs because capillary permeability is reduced, preventing plasma recirculatione. Inflammatory chemicals at the site of inflammation act as chemotactic agentsarrow_forwardAntibodies against a specific antigen can be injected into a person to provide passive immunity. For which reason is this NOT as effective as the process of vaccination with that antigen? Select one: a. Injection of antibodies may cause allergic reactions, while vaccination never causes allergic reactions. b. Injection of antibodies does not provide long-lasting immunity, and vaccination with antigens triggers a clonal selection of B cells and cytotoxic T cells. c. Vaccination with antigens triggers a clonal selection of B cells and cytotoxic T cells. d. Injection of antibodies does not provide long-lasting immunity. e. Injection of antibodies does not provide long-lasting immunity and may cause allergic reactions, while vaccination never causes allergic reactions.arrow_forward
- The immune system includes the various responses the body uses to ensure survival in the presence of disease-causing agents. Identify the example of innate immunity. A. Infected host cells are killed by toxic proteins from cytotoxic T cells. B. Toll-like receptors bind to foreign molecule fragments to initiate immune response. C. CD4 accessory proteins on the helper T cell surface bind to class II MHC molecules. D. IgE antibodies recognize and attach to pollen grains, stimulating an allergic reaction.arrow_forwardWhich is/are not part of adaptive immunity?a. phagocytic cells e. antigen receptorsb. antigen-presenting cells f. cytokinesc. MHC markers g. antibodiesd. complement activation h.all take partarrow_forwardCHAPTER 20 The Lymphatic System and Immunity Matching SECTION 3 Revie w Match each lettered term with the most closely related description. a. opsonization 1 b. helper T cells Two parallel pairs of polypeptide chains Found on helper T cells C. antibody d. class II MHC 3 Active and passive 4 Transfer of antibodies e. costimulation Attacked by HIV f. IgM 6 Enhances phagocytosis g. class I MHC h. IgG 7 MHC proteins present in the plasma membranes of all nucleated cells i. passive immunity j. anaphylaxis 8 Differentiate into memory and plasma cells 9 MHC proteins present in the plasma membranes of all APCS and lymphocytes 9 k. CD4 markers 10 I. acquired immunity 10 Antibodies used to determine blood type 11 m. B lymphocytes 11 Secondary binding process required for T cell activation 12 12 Accounts for 80 percent of all immunoglobulins 13 13 Circulating allergen stimulates mast cells throughout body Match each lettered term with thearrow_forward
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