WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 27, Problem 4MC
Summary Introduction
Introduction:
Vaccines are a way of safely exposing the immune system to the pathogen to develop immunity against it.
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Which one of the following most correctly describes vaccines containing live, attenuated pathogens?
A.They are administered by injection.
B.They provide little cell-mediated immunity.
C.There is no possibility for reversion to pathogenic form.
D.Pathogen does not multiply in human hosts
E.They provide extended, sometimes life-long immunity.
Which of the following statements does not
describe tolerogens accurately?
Select one:
A. They can be the same molecules as
immunogens.
B. They lead immune cells to become
unresponsive.
C. They can be foreign antigens.
D. They affect B cells but not T cells.
E. The can be presented by antigen-
presenting cells.
Which of the following statements is most correct regarding SCIDs?a. They are the least severe form of primary immunodeficiency disease.b. They result from viral infections.c. They result from the action of complement.d. They involve dysfunction of both lymphocyte (B- and T-cell) systems.
Chapter 27 Solutions
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_forwardWhich of these is a valid example of an antigen and its corresponding epitope? Select one: a. An antigen is a retrovirus and an epitope is a portion of the retrovirus to which an antibody or T-cell binds. b. An antigen is an antibody and an epitope is the cytotoxic T-cell produced to degrade the antibody. c. None of these choices. d. An antigen is a cytotoxic T-cell and an epitope is a molecular portion of foreign material. e. An antigen is an antibody and the epitope is a virus to which the antigen binds.arrow_forwardActive vs Passive vaccination, which is false: A. Passive vaccination: involves infusion of another person's activated B cells resulting in immediately available antibodies. B. Active immunity provides long term protection C. Passive immunity produces short term protection from the specific virus D. Attentuated live vaccines, subunit vaccines including empty capsids, and recombinate vaccines are example of active vaccination.arrow_forward
- Maternal antibodies transmitted via the placenta: A. are an example of natural passive immunity B. are an example of natural active immunity C. are IgG antibodies D. both are IgG antibodies and are an example of natural active immunity E. both are IgG antibodies and are an example of natural passive immunityarrow_forwardWhich of the following is NOT true regarding the alternative complement pathway? It can be triggered by infectious agent in absence of antibody. а. b. It does not require C1, C2 or C4. с. It cannot be initiated unless C3b fragments are already present. d. It has the terminal sequence of events as the lectin pathway.arrow_forwardWhich of the following is a critical feature ofimmediate hypersensitivity?a. inflammationb. cytotoxic T cellsc. recruitment of immune cellsd. histamine releasearrow_forward
- CHAPTER 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_forwardExplain 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.arrow_forwardThe capsule of the infecting microorganism which is composed of polysaccharides can also activate complement directly in the absence of A. Antibody via Alternative pathway B. Antibody via metabolic pathway C. Antigen via Alternative pathway D. None of the abovearrow_forward
- Which of these statements about the Fab portion of antibodies is true? a.It binds to antigens. b.Its amino acid sequences are variable. c. It consists of both H and L chains. d. All of these are true.arrow_forwardExplain why each choice (a-d) is correct or incorrect. Allergens differ from antigens because a. Allergens produce an abnormally large immune response to what is an otherwise harmless particle. b. Allergens do not involve the leucocytes, they simple stimulate the inflammatory response. c. Allergens are only active seasonally and are generally harmless to the body. d. Allergens are primarily plant derived while antigens are bacterial or viral in nature.arrow_forward1.A given B cell expresses only maternally or paternally derived heavy chains but never both. This observation is the result of A. antibodydiversity.B. isotypeswitching.C. allelicexclusion.D. affinitymaturation.E. randomVJgenerearrangement. 2.Which of the following antibody classes or isotypes facilitate the sequential binding of the C1, C4, C2, and C3 components of the complement system? A. IgAandIgD B. IgAandIgE C. IgDandIgM D. IgE and IgG E. IgMandIgGarrow_forward
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Immune response: summary; Author: Dr Bhavsar Biology;https://www.youtube.com/watch?v=ADANgHkX4OY;License: Standard Youtube License