Which statements are true? Explain why or why not.1 T cells whose receptors strongly bind a self-pep-tide–MHC complex are killed off in peripheral lymphoidorgans when they encounter the self peptide on an anti-gen-presenting dendritic cell. 2 To guarantee that the antigen-presenting cells inthe thymus will display a complete repertoire of self pep-tides to allow elimination of self-reactive T cells, the thy-mus recruits dendritic cells from all over the body. 3 The antibody diversity created by the combinato-rial joining of V, D, and J segments by V(D)J recombinationpales in comparison to the enormous diversity created bythe random gain and loss of nucleotides at V, D, and J join-ing sites.

Which statements are true? Explain why or why not.1 T cells whose receptors strongly bind a self-pep-tide–MHC complex are killed off in peripheral lymphoidorgans when they encounter the self peptide on an anti-gen-presenting dendritic cell. 2 To guarantee that the antigen-presenting cells inthe thymus will display a complete repertoire of self pep-tides to allow elimination of self-reactive T cells, the thy-mus recruits dendritic cells from all over the body. 3 The antibody diversity created by the combinato-rial joining of V, D, and J segments by V(D)J recombinationpales in comparison to the enormous diversity created bythe random gain and loss of nucleotides at V, D, and J join-ing sites.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter17: Genes And The Immune System

Section: Chapter Questions

Problem 21QP

See similar textbooks

Similar questions

Irradiation of mice with a dose of 600 rad of total body irradiation eliminates 95% of total lymphocytes from spleen and lymph nodes and also eliminates all antigen-specific memory B cells. Nonetheless, when Influenza A-infected mice are subjected to this irradiation at 60-days post-infection, and then reconstituted with bone marrow cells from a naive mouse (this replenishes all of the lymphocyte populations), the levels of circulating anti-Influenza A IgG antibodies show nearly no decline when mice are monitored for the following year. What is the explanation for this finding?
Briefly describe the effector functions of the following subsets of CD4* helper T lymphocytes and distinguish their cytokine profiles: уThi cell ii)Th2 cell
There are several important mechanisms for generating diversity in immunoglobulin and T cell receptors. Explain the similarities and differences in mechanisms that generates diversity in these receptors.
Briefly describe the effector functions and mediators of the following CD4 T lymphocyte subsets. List the cytokines and principal transcription factors that induce differentiation of CD4 T cells into these subtypes. (i) Th1 cell (ii) Th2 cel
Match the term with its correct description. selection for thymocytes which recognize self MHC molecules elimination of thymocytes which recognize self continued alpha chain rearrangement until a functional TCR is generated process by which autoreactive thymocytes are eliminated in the thymus activation of a T-cell only if the appropriate MHC molecule presents an antigenic peptide ✓Choose... Apoptosis MHC restriction Positive selection Negative selection T-cell receptor editing Choose...
Immunity has been a major concern globally due to the COVID-19 pandemic. Describe the lymphatic circulation and the different lymphoid organs.
"Gamma-delta' T cells differ from 'alpha-beta' T cells by all of the following except O alpha-beta cells are more commonly found in skin and other tissues, while gamma-delta cells are primarily in lymph nodes. gamma-delta cells undergo more hypermutation for their receptor genes. gamma-delta cells respond more with non-peptide antigens, especially phospholipids. O production of an effector response occurs more rapidly in alpha-beta T cells.
Helper T cells can be activated by macrophages(which engulf everything indiscriminately) or by B cells (which only engulf antigens that stick to their receptors). A. What properties so macrophages and B cells have ibn common that allows them both to activate T cells? B. It has been suggested that macrophages probably do most to fhte T cell activating in the primary response but B cells do most of it in the secondary response. Why does this make sense?
The T lymphocytes as macrophages, secrete a number of polypeptides (cytokines) generally called lymphokines that serve as autocrine regulators of the immune system. Identify any five (5) lymphokines and explain their functions.
1- B cell clones undergo somatic hypermutation in which structure? Group of answer choices A) Thymic cortex B) Bone marrow C) Primary focus D) Germinal center dark zone 2- During T cell development, the surrogate alpha chain (pTalpha) is considered analogous to the surrogate light chains (lambda5 and VpreB) expressed during B cell development. Which complexes do these surrogate protein chains help form in T cell and B cells, respectively? Group of answer choices A) Mature TCR and transitional B cell BCR B) Double positive thymocyte CD4/CD8 complex and mature naive B cell IgD/IgM complex C) preTCR and preBCR D) Thymic progenitor Notch receptor and early pro-B cell IL-7 receptor
During the early developmental stages of α:β T cells in the thymus, there are two key checkpoints that must be satisfied to permit the progression of T-cell development. Explain what occurs at each checkpoint.
2015.01 ImmunologY Intercept, processing, and presentation of Ag bone marrow hematopoietic stem cells On cytokines secreted by Th2 to activate 8 cell proliferation secreted on exposure to allergen, e.g. pollen is also an endogenous pyrogen, Le. stimulates hypothalamus to increase body temperature secreted by Te to "kill" target cells secreted by Th to activate Th1 response (CMI) 1 2 3. 4 5. IL-1 IL-2 Cytotoxin/porin Histamine IL-5