Which of these statements best demonstrates the difference between the action of B cells and T cells during an immune response? O B cells carry out the cell-mediated response; cytotoxic T cells carry out the humoral response B cells confer active immunity; cytotoxic T cells confer passive immunity B cells respond the first time a pathogen in present; cytotoxic T cells respond all subsequent times B cells secrete antibodies against a pathogen; cytotoxic T cells kill pathogen-infected host cells

Which of these statements best demonstrates the difference between the action of B cells and T cells during an immune response? O B cells carry out the cell-mediated response; cytotoxic T cells carry out the humoral response B cells confer active immunity; cytotoxic T cells confer passive immunity B cells respond the first time a pathogen in present; cytotoxic T cells respond all subsequent times B cells secrete antibodies against a pathogen; cytotoxic T cells kill pathogen-infected host cells

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...

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Figure 42.11 Which of the following statements about T cells is false? Helper T cells release cytokines while cytotoxic T cells kill the infected cell. Helper T cells are CD4+, while cytotoxic T cells are CD8+. MHC II is a receptor found on most body cells, while MHC I is a receptor found on immune cells only. The T cell receptor is found on both CD4+ and CD8+ T cells.
T cells that secrete cytokines that help antibody responses are called ________. Thl Th2 regulatory T cells thymocytes
Question 3 Which of the following statements about TI-1 antigens is FALSE? They require T cell help They do not result in memory cells They do not result in class switch or somatic hypermutation They contain a mitogen Question 4 What transcription factor is used to identify Treg celis? A) FoxP3 CTLA4 GATA3 D BCL6
Question 3 Select one answer.T cells come in several varieties. Cytotoxic T cells are important because they can become activated and kill target cells. Which of the following are not needed directly for Cytotoxic T cell activation? a. Cytokinesb. Interferonsc. Complementd. Antibodiese. All are correct
Which of the following are differentiated effector cells that can actively secrete antibodies? antimicrobial proteins C and C3b B lymphocytes plasma cells macrophages T lymphocytes
Non- Specific Defence Specific Defence Physical barriers – Skin, Mucous membrane Lymphocytes – Bcells and T cells Components Killer t cells Activity Response and Potency Specificity Course Memory Complete the above table and compare the similarities and differences between specific and non-specific defence systems. Why it is beneficial to have both types of responses?
Which of the following statement is TRUE about effector cells? (Select all that apply) Effector cells are created once adaptive immune cells are activated B cell effector cells are called plasma cells T cell effector cells are called memory cells T cell effector cells are the same, regardless of surface cell receptor Each immune response cell has its own effector cell Effector cells arise from differentiation
The following events elicit an antibody response to a T-dependent antigen (Ag). Put them in order and indicate which one would happen third (of the five answers as shown, not necessarily number 3 on a lecture slide or text diagram). O Ag-presenting cell displays Ag fragments next to self (MHC) molecule on its surface Helper T cell (TH) activates an appropriate B cell Helper T cell (TH) specific for the Ag binds to MHC-Ag complex B cell differentiates into a plasma cell; secretes antibodies specific for the Ag Ag-presenting cell phagocytizes Ag-carrying microbe
O False Question 33 Which of the following is NOT a function of a CD4 T cell? O They secrete granzymes that kill virus-infected cells. O Thry secrete interleukins that help stimulate B cells. O They secrete interleukins that help stimulate CD8 T cells.
Describe HOW the spike protein produced by your own cells results in an immune response, antibody production and memory! You will need to mention the cell receptors involved, the specific T-cells and "other" lymphocytes that are part of this process and explain how all of this leads to antibody production and circulation for three months. Need answer in short but ASAPLY
Some individuals with immunodeficiency have mutations in the digesting enzymes of their macrophages. What impact might this have on their immune systems? Question 8 options: The adaptive immune response may no longer be activated. Macrophage will no longer recognize the PAMPs with their TLRs. Macrophages will not release cytokines upon tissue damage. MHC receptors will present antigens on the surface of the macrophages.
Which of the following best describes the function of IgA antibodies? O Allergy response O Defense against pathogens at mucosal surfaces by neutralizing them and preventing their attachment to host cells Activation of complement system to destroy bacteria and viruses Killing infected cells by recognizing and attacking their surface antigens Which of the following statements about cytotoxic T cells and MHC is true? O Cytotoxic T cells recognize antigens presented by MHC class I molecules on the surface of all cells in the body. O MHC class I molecules are only found on antigen-presenting cells, such as dendritic cells and macrophages and not on cytotoxic T cells O MHC class Il molecules are only found on infected cells, which present antigens to cytotoxic T cells. O Cytotoxic T cells recognize antigens presented by MHC class II molecules on the surface of all cells in the body.