Each of the following statements is false. Please correct. a. Mature T cells are found only in the lymph nodes and spleen b. The pluripotent stem cell is one of the most abundant cell types in the bone marrow c. There are no stem cells in blood d. Activation of macrophages increases their expression of MHC class I molecules, allowing them to present antigen to CD4+ TH cells more effectively e. B cells develop in the thymus f. Lymphoid follicles are present only in the spleen and lymph nodes g. The FRC guides B cells to follicles h. Infection has no influence on the rate of hematopoiesis i. Follicular dendritic cells can process and present antigen to T lymphocytes j. Dendritic cells arise only from the myeloid lineage k. All lymphoid cells have antigen-specific receptors on their membrane l. All vertebrates generate B lymphocytes in bone marrow m. Only mammals have a thymus n. Jawless vertebrates do not have lymphocytes

Each of the following statements is false. Please correct. a. Mature T cells are found only in the lymph nodes and spleen b. The pluripotent stem cell is one of the most abundant cell types in the bone marrow c. There are no stem cells in blood d. Activation of macrophages increases their expression of MHC class I molecules, allowing them to present antigen to CD4+ TH cells more effectively e. B cells develop in the thymus f. Lymphoid follicles are present only in the spleen and lymph nodes g. The FRC guides B cells to follicles h. Infection has no influence on the rate of hematopoiesis i. Follicular dendritic cells can process and present antigen to T lymphocytes j. Dendritic cells arise only from the myeloid lineage k. All lymphoid cells have antigen-specific receptors on their membrane l. All vertebrates generate B lymphocytes in bone marrow m. Only mammals have a thymus n. Jawless vertebrates do not have lymphocytes

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter42: The Immune System

Section: Chapter Questions

Problem 1VCQ: Figure 42.11 Which of the following statements about T cells is false? Helper T cells release...

See similar textbooks

Similar questions

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...
Match the terms to their most approriate description. Select the INCORRECT match. a. Subunit vaccine / Part of a pathogen rather than the complete cell or virus b. Toxoid / Antigenic but non-toxic derivative of a toxin c. Perforin / Molecule that is part of the complement cascade d. Antitoxin / Neutralizing antibodies e. Superantigen / Bacterial exotoxin that activates a high percentage of T cells
Match the type or cause of clonal expansion with the correct situation. Use each choice just one time and make the best match. Clonal expansion of B cells because the cells are infected with EBV Clonal expansion of B-cells because these B-cells have B Cell Receptors that recognize a non-self antigen Clonal expansion of T-cells that have a T Cell Receptor that recognizes EBV antigens A. normal adaptive response by the B cells B. part of pathogenesis of mono C. This allows the adaptive immune system to shut down active EBV infection
A 67‐year‐old man with rheumatoid arthritis presents with neutropenia. The blood count shows a mild lymphocytosis with an increased number of cells which express CD3, CD16 and CD57. T cell gene rearrangement study shows a clonal band. Which ONE of the following is the diagnosis in this case? Select one: A.Mycosis fungoides B.Infectious mononucleosis C.Large granular lymphocyte leukaemia D.Chronic lymphocytic leukaemia
Which of the following statements is the most accurate concerning lymphocytes? a. T cells and B cells both express TCRs. These are the product of approximately 100 genes. Each lymphocyte expresses only one of the ~100 receptors coded for by these genes, and in the absence of clonal selection the liklihood that two cells express the same receptor is only moderate b. T cells and B cells express TCRs and BCRs respectively. These are the product of genetic recombination and can comprise one of millions of combinations. Each lymphocyte can express 1000s of different receptor variants, maximizing the likelihood that a single adaptive immune cell will recognize pathogen-associated antigens. c. T cells and B cells express TCRs and BCRs respectively. These are the product of genetic recombination and can comprise one of millions of combinations. Each lymphocyte expresses only one of these receptors, and in the absence of clonal selection the liklihood that two cells express the same…
Which of the following is NOT a involved in the CD8-T-cell killing of viral-infected cells? Select one: a. Recognition of the MHC Class I and viral-derived peptide on the surface of the target cell Ob. Reorientation of the intracellular cytoskeleton to move the cytotoxic granules toward the SMAC c. Release of perforin and granzymes onto the infected target cell Od. Induction of apoptosis in the target cell by cleaving the nuclear DNA. e. Costimulation of CD8-T-cells with CD28/B7
The selection process for T cells is more complex than B cells. Please explain the process, why it is more complex, and how/why autoreactive T cells are allowed to leave the thymus.
All 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.
All of the following are characteristic of regulatory T cells except a. they express CD25 b. they facilitate the proliferation of naive T cells interacting with the same antigen-presenting cell c. they express CD4 d. they express the transcriptional repressor FoxP3 e. they express MHC class II-restricted T-cell receptors specific for self antigen.
CHAPTER 20 The Lymphatic System and Immunity Matching SECTION 3 Revie w Match each lettered term with the most closely related description. a. opsonization 1 b. helper T cells Two parallel pairs of polypeptide chains Found on helper T cells C. antibody d. class II MHC 3 Active and passive 4 Transfer of antibodies e. costimulation Attacked by HIV f. IgM 6 Enhances phagocytosis g. class I MHC h. IgG 7 MHC proteins present in the plasma membranes of all nucleated cells i. passive immunity j. anaphylaxis 8 Differentiate into memory and plasma cells 9 MHC proteins present in the plasma membranes of all APCS and lymphocytes 9 k. CD4 markers 10 I. acquired immunity 10 Antibodies used to determine blood type 11 m. B lymphocytes 11 Secondary binding process required for T cell activation 12 12 Accounts for 80 percent of all immunoglobulins 13 13 Circulating allergen stimulates mast cells throughout body Match each lettered term with the
Match each lettered term with the most closely related description. a. cytotoxic T cells Stimulated by the release of cytokines from macrophages, helper T cells, and interferons, b. viruses The race is on: с. В сеlls 15 14 d. antibodies try to replicate before the immune system can mount a response. Two have already taken over cells in the body. quickly recognize the viruses as a foreign threat. They begin destroying viruses by engulfing them. e. helper T cells join the attack on virus- infected cells. They also fight cancer cells. f. macrophages g. natural killer (NK) cells h. regulatory T cells eieg ucl bris ah lo oolom i. memory T cells and B cells neo alled 18 alloo omeslo ofni ola 19 17 are Y-shaped proteins designed specifically to recognize a particular viral mature into plasma cells, which in turn produce Y-shaped proteins. ebie hel ert beer honelni vood avtne er (the battle managers of the immune system) emit sig- nals to other lymphocytes to join the attack. oeonetelagn or…
Match the term with its correct description. Transcription factor required for T-cell development Composed of superdimer, CD3 and zeta chain Facilitates the expression of tissue-specific genes in thymic epithelium Selection for thymocytes which recognize self MHC molecules Elimination of thymocytes which recognize self ✓Choose... Negative selection Notch 1 Pre-T-cell receptor Positive selection AIRE Choose...