EBK BIOLOGY
5th Edition
ISBN: 8220101337627
Author: Maier
Publisher: PEARSON
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Question
Chapter 20, Problem 9LTB
Summary Introduction
Introduction:
The humoral responses are the immune response to the foreign antigen that occurs by the production of specific antibodies produced by the plasma cells. It takes place with the help of the B cells and the T helper cells.
Cell-Mediated immunity does not involve the activity of the antibodies. T takes place by the activation of the phagocytic cells. The components involved in this are cytotoxic t lymphocytes, cytokines, etc.
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Helper T cells do not _________.
Select one:
a. secrete cytokines that stimulate clonal selection of B cells.
b. secrete inflammatory chemicals.
c. secrete cytokines that stimulate macrophage activity.
d. secrete cytokines that stimulate clonal selection of cytotoxic T cells.
e. secrete fever-producing chemicals.
Identify each immune response as either humoral (H) or cellular (C).
A.
release of histamine causes itching & sneezing
B.
cytotoxic T lymphocytes kill infected cells
C.
plasma B cells are cloned
D.
antibodies mark pathogen’s antigens
E.
cytokines signal B & T cell production
F.
macrophage presents antigen to the matching receptor on helper T cell
Unlike cytotoxic T lymphocytes, NK cells do not _____. (Select all that apply.)
a. secrete cytokines
b. participate in the adaptive immune response
c. rearrange T-cell receptor genes
d. use MHC class I molecules for their development and function
e. express CD3 components.
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Similar questions
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- Which 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_forwardwhich 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 cellsarrow_forwardAn adult who has been thymectomized will have a T-cell repertoire that _____. a. resembles a patient with DiGeorge syndrome b. is MHC-independent c. is dominated by γ:δ T cells d. fails to provide protective T-cell immunity e. is self-renewing and long lived and does not require replenishment from the thymus.arrow_forward
- The lymphatic system... A.Has a pumping mechanism to move fluid. B. Includes areas of high concentrations of APCs, T and B cells. C. Collects fluid from around the brain and spinal cord. D. Is very impermeable to extracellular fluid. E. Is the site of B and T cell clonal deletion.arrow_forwardLoss-of-function mutations in the common γ chain (γc) gene are particularly damaging to the immune system because _____. a. homozygotes and heterozygotes fail to make sufficient γc protein for lymphocyte activation b. T cells fail to develop in the thymus c. T-cell dependent and T-cell independent B-cell responses are inhibited d. multiple cytokine receptors cannot signal e. MHC class II genes are unable to be expressed.arrow_forwardSuppose 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_forward
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