28. The molecules mediating signal transduction on a B-cell following antigen bindingto BCR are called?A lg FcB Ig-a and Ig-BC MHC29. Autoreactive B cells are removed during ................stageA Pro B cellB Pre-B cellC immature B cellD CD4E CD8D mature B cell

B cell It is a type of lymphocyte which is involved in providing the humoral immunity component of…

28. The molecules mediating signal transduction on a B-cell following antigen binding to BCR are called? B Ig-a and lg-ß C MHC A lg Fc D CD4 29. Autoreactive B cells are removed during ..................tage Pro B cell B Pre-B cell C immature B cell E CD8 D mature B cell

28. The molecules mediating signal transduction on a B-cell following antigen binding to BCR are called? B Ig-a and lg-ß C MHC A lg Fc D CD4 29. Autoreactive B cells are removed during ..................tage Pro B cell B Pre-B cell C immature B cell E CD8 D mature B cell

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter45: Defenses Against Disease

Section: Chapter Questions

Problem 4TYK

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Concept explainers

Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.

Question

28. The molecules mediating signal transduction on a B-cell following antigen binding
to BCR are called?
A lg Fc
B Ig-a and Ig-B
C MHC
29. Autoreactive B cells are removed during ................stage
A Pro B cell
B Pre-B cell
C immature B cell
D CD4
E CD8
D mature B cell

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1- Which of the following statements regarding B cell development is correct? a- Functional mature b cells depend on the surface expression of surrogate light chain b- Mature b cells are absent in mice lacking activation induced cytidine deaminase 2- Which statement regarding T lymphocytes is false? a- MHC restriction by gamma delta T cells helps to prevent aberrant activation by self – antigens b- A TCR must be expressed on the surface of a thymocyte in order for positive selection to occur c- The thymus of MHC class II deficient mice contain CD4+ CD8+ T lymphocytes Please answer asap and in short and content should not be palgarised please
Activated helper T Cells participate in which of the following processes? a.) Differentiation of memory B cells b.) Activation of cytotoxic T Cells c.) Facilitation of macrophage phagocytosis d.) All of above
In the secondary response, the IgG levels rise much faster than they did during the first antibody response. Why is this?Choose one: A. The plasma cells that were produced for the first response have a very long half-life, so they are able to produce antibodies for the second response without activation of other B cells. B. Memory B cells are capable of producing antibodies directly, so there is no need to spend time differentiating them into plasma cells. C. By the secondary response, there are B cells and T cells that have differentiated into plasma cells, giving more total plasma cells to work with. D. Memory B cells are present for the secondary response. Those cells are much easier to activate than the naive B cells; therefore, the response occurs much more quickly and on a larger scale.
At what stage of B cell development are autoreactive cells removed? A. stem cell stage B. pro-B cell stage C. early pre-B cell stage D. late pre-B cell stage E. immature cell stage
B lymphocytes, the precursors of plasma cells, are triggered to proliferate by the binding of multivalent antigens to receptors on their surfaces. The cell-surface receptors are transmembrane immunoglobulins. Univalent antigens, in contrast, do not activate B cells. (a) What do these findings reveal about the mechanism of B-cell activation? (b) How might antibodies be used to activate B cells?
of the choices, which cells stimulate directly B cells to divide and produce antibodies? a. mast cells b. marcophages c. Nk cells d. TH cells
The germinal center of a lymph node a. Is the location of B cells undergoing clonal expansion b. Is the location of plasma cells c. Is the location of B cells that have not yet contacted their antigen d. In a micrograph, Is the light-colored center of an activated lymphoid follicle
There are different pathways through which B cells can be activated, one of which is CD4 T - independent cells, in which the antigen is large and has repeating patterns that make crosslinking and activation of several BCRs at the same time. A.true B.false
Choose the most accurate characteristic of B cells. A) They help establish and control the sensitivity of the immune response. B) They stimulate the activities of T cells. C) They attack foreign cells, normal cells infected with viruses, and cancer cells that appear in normal tissues. D) They continually monitor peripheral tissues. E) They differentiate into plasma cells that secrete antibodies.
CD4 markers are associated with (a) cytotoxic cells. (b) suppressor cells. (c) helper T cells. (d) a, b, and c.
277. Which of the following best describes the reason that the B cell receptor cannot transduce signals to the inside the cell once it binds antigen? A. The receptor requires twice the amount of antigen to be activated because it contains two sites. antigen binding b. lga is rapidly dephosphorylated c. The cytoplasmic domain of the receptor consists of 3 amino acids. d. Immunoglobulins (Ig) are inflexible molecules
Which of the following cell types is unable to interact with naive T cells and induce their activation? (Select all that apply.) a. B cells b. macrophages resident in infected tissues c. macrophages resident in secondary lymphoid tissue d. interdigitating reticular cells e. immature dendritic cells.