CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 24, Problem 5TYK
Summary Introduction
Introduction:
The immune system of the human body is divided into two main branches, namely the innate immunity and the adaptive immunity. Innate or body’s first defense mechanism is present since birth and this defense mechanism are non-specific, which means it acts as a barrier in for every foreign body irrespective of its structure. Adaptive immunity of the body comes in later stages, when the body is introduced to pathogens. It is a specific type of defense mechanism.
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Students have asked these similar questions
which of the following cells secrete cytokines that activate B cells, T cells, and macrophages?
a. T helper cells
b. regulatory T cells
c. T cytotoxic cells
d. dendritic cells
Which cells produce antibodies?
a. Neutrophils.
b. Dendritic cells.
c. Cytotoxic T cells.
d. Plasma cells.
The role of the humoral immune response is to
a. kill infected cellsb. fight pathogens found in body fluid
c. prevent pathogens from entering the body
d. initiate an inflammatory response
Which of the following is NOT true about T cells?
A. Natural killer cells (NK) are exclusively differentiated T cells
B. T cells act in situations where antigens are embedded in cell membranes or are inside host cells and thus are inaccessible to antibodies
C. T cells develop from lymphoid stem cells in bone marrow and mature in the thymus
D. Cell-mediated immunity is primarily carried out by T cells
Chapter 24 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 24 - Complete this concept map to summarize the key...Ch. 24 - Foreign molecules that elicit an immune response...Ch. 24 - Which of the following is not part of the...Ch. 24 - Which of the following best describes the...Ch. 24 - Prob. 5TYKCh. 24 - Prob. 6TYKCh. 24 - Prob. 7TYKCh. 24 - Prob. 8TYKCh. 24 - Prob. 9TYKCh. 24 - Which of the following statements is not true? a....
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- 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.arrow_forwardDecreased immunity is a symptom of HIV/AIDS. This is caused by which of the following? Select one: a. HIV destroys antigens. This decreases the possibility of recognizing pathogens in the future. b. HIV destroys memory T cells. If the body is infected again, there is no antibodies to fight an infection. c. HIV attacks the macrophages. Pathogens cannot be destroyed once they enter the body. d. HIV attacks the helper T cells. This allows pathogen cells to enter the body unnoticed.arrow_forwardReceptors that trigger innate immune responses a. are antibodies recognizing specific antigens. b. are T-cell receptors recognizing specific antigens. c. recognize pathogen-associated molecular patterns. d. are not specific at all.arrow_forward
- Which of the following plays a role in the Arthus reaction?a. IgE antibodies. b. complement c. cell-associated antigen d. cytotoxic T cellsarrow_forwardWhich 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_forwardTo become a fully activated, antibody-secreting cell, B cells usually need: a. to encounter an antigen or receive a signal delivered by a helper T cell. b. to ingest a foreign invader such as a microobe. c. activation by a plasma cell d. contact with an antigen and helper T cell cytokinesarrow_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 of the following statements best characterizes interferons? A. Interferons are a nonspecific defense used to respond to viruses. B. Interferons are part of the humoral immune response against viruses. C. Interferons are part of the humoral immune response against bacteria. D. Interferons are a nonspecific defense used to respond to bacteria.arrow_forwardWhich of the following pairs is mismatched? a. T-cell activation: cell division and differentiation b. effector B cell: plasma cell c. plasma cell: antibody secretion d. helper T cell: kills pathogen-infected cells e. helper T cell: facilitates the differentiation of B cells.arrow_forward
- Suppose a person recovers normally from viral infections, but then gets the same viral infections over and over again- unlike the rest of us. A. What is probably wrong –B cells, helper T cells and/or cytotoxic T cells? B. Should this person be at a higher risk of cancer than the rest of us? C. Should this person be able to lyse bacterial cells as well as the rest of us? D. Should this person tolerate a graft (from an unreated person) better than you are me?arrow_forwardWhich 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.arrow_forwardThe T-cell antigen receptor is similar to immunoglobulin molecules in that it: a. can cross the placenta and provide protection to a fetus b. remains bound to the cell surface and is never secreted c. binds complement d. contains V and C regions on each of its chainarrow_forward
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