EBK BIOLOGY
5th Edition
ISBN: 9780100667976
Author: Maier
Publisher: YUZU
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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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- To 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_forwardAll of the following are true in reference to T-cell priming except _____. a. it occurs in primary lymphoid organs b. it transforms naive T cells into differentiated effector T cells c. it is the first stage of a primary adaptive immune response d. it requires interaction between naive T cells and antigen-presenting cells e. it takes place in many locations including, but not limited to, lymph nodes, Peyer’s patches, and the tonsils.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_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_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_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_forward
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