BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 50, Problem 7U
Suppose that a new disease is discovered that suppresses the immune system. Which of the following would indicate that the disease specifically affects the B cells rather than the helper or cytotoxic T cells?
a. A decrease in the production of interleukin-2
b. A decrease in interferon production
c. A decrease in the number of plasma cells
d. A decrease in the production of interleukin-1
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Students have asked these similar questions
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?
Explain why each choice (a-d) is correct or incorrect.
In clonal selection of B cells, which substance is responsible for determining which cells will eventually become clones?
a. Antigen
b. Interferon
c. Antibody
d. Complement
Explain 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.
Chapter 50 Solutions
BIOLOGY
Ch. 50.1 - Prob. 1LOCh. 50.1 - Prob. 2LOCh. 50.1 - Prob. 3LOCh. 50.2 - Prob. 1LOCh. 50.2 - Prob. 2LOCh. 50.2 - Prob. 3LOCh. 50.3 - Prob. 1LOCh. 50.3 - Prob. 2LOCh. 50.4 - Explain how antibody diversity is generated.Ch. 50.4 - Prob. 2LO
Ch. 50.4 - Prob. 3LOCh. 50.5 - Define autoimmune diseases.Ch. 50.5 - Prob. 2LOCh. 50.6 - Explain antigenantibody reactions in the ABO blood...Ch. 50.6 - Prob. 2LOCh. 50.6 - Prob. 3LOCh. 50.7 - Prob. 1LOCh. 50.7 - Prob. 2LOCh. 50 - How would a high level of HCG present in a urine...Ch. 50 - What would happen if an NK cell killed a virally...Ch. 50 - Prob. 2IQCh. 50 - Prob. 3IQCh. 50 - Prob. 4IQCh. 50 - Cells that target and kill body cells infected by...Ch. 50 - Structures on invading cells recognized by the...Ch. 50 - Which one of the following acts as the alarm...Ch. 50 - Prob. 4UCh. 50 - Receptors that trigger innate immune responses a....Ch. 50 - Diseases in which the persons immune system no...Ch. 50 - Suppose that a new disease is discovered that...Ch. 50 - You start a new job in a research lab. The lab...Ch. 50 - In comparing T-cell receptors and immunoglobulins...Ch. 50 - If you have type AB blood, which of the following...Ch. 50 - Suppose that you get a paper cut while studying....Ch. 50 - If you wanted to cure allergies by bioengineering...Ch. 50 - Why do we need to be repeatedly vaccinated for...Ch. 50 - Prob. 7ACh. 50 - Suppose you take a job in the marketing department...Ch. 50 - Prob. 2SCh. 50 - Prob. 3SCh. 50 - Toll-like receptors have been found in a wide...
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- Which innate immune system component uses MHC I molecules directly in its defense strategy? a. macrophages b. neutrophils c. NK cells d. interferonarrow_forwardWhich innate immune system component uses MHC class I molecules directly in its defense strategy? a. macrophages b. neutrophils c. NK cells d. interferonarrow_forwardSome individuals are immune-compromised because their bodies do not make enough T-cells. What is the difference between a T-cell and any other cell type in the body? a. T-cells have different genomes than cells of other types b. T-cells have different genes than cells of other types c. T-cells have different proteins than cells of other typesarrow_forward
- Which of these statements about gamma interferon is false? a. It is a polypeptide autocrine regulator. b. It can be produced in response to viral infections. c. It stimulates the immune system to attack infected cells and tumors. d.It is produced by almost all cells in the body.arrow_forwardHow is the cytotoxic T cell mechanism of action similar to that of complement? A. Cytotoxic T cells secrete the proteins that activate complement. В. Cytotoxic T cells induce cell lysis with perforin, a protein similar to complement's MAC. C. Cytotoxic T cells activate B cells to produce antibodies. D. Cytotoxic T cells are antigen-presenting cells similar to the complement proteins found on B cells.arrow_forwardWhich event happens first during cytotoxic T-cell activation? a. Cytotoxic T cells secrete perforin and granzyme. b. Cytotoxic T cells recognize foreign antigen presented on the surface of a MHC I molecule. c. Cytotoxic T cells proliferate to form many new cells specific for the same antigen d. Cytotoxic T cells recognize foreign antigen presented on the surface of a TCR.arrow_forward
- Which of these cell types aids the activation of T lymphocytes by antigens? a. Macrophages b. Neutrophils c. Mast cells d. Natural killer cellsarrow_forwardWhich statement is incorrect?a. IgG is the most abundant antibody in bloodb. Antibodies can exist at the surface of a B cell, or circulate freely in blood.c. IgM is found in the lining of the genitourinary, gastrointestinal and respiratory tractsd. IgE is involved allergic reactionse. Macrophages are involved in chronic infectionsarrow_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
- In what process is clonal selection important?a. Complement function c. Inflammationb. B cell activation d. Phagocytosisarrow_forwardWhich 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 responsearrow_forwardWhich type of cell actually secretes antibodies?a. T cell b. macrophage c. plasma cell d. monocytearrow_forward
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