All of the following regarding CD1a, b, and c are true except _____. a. They have a more limited tissue distribution than CD1d. b. CD1b associates with CD1e for the purpose of lipid transfer. c. They cycle through endosomal vesicles in different locations of the cell with the assistance of adaptor proteins. d. They possess different sizes of antigen-binding sites. e. They all present lipid antigens. f. They cycle continually between the cell surface and endosomal compartments, allowing exchange of antigens. g. CD1b can accommodate more than one antigen simultaneously. h. They are expressed by double-positive thymocytes and facilitate positive selection of CD1-restricted T cells. i. They present antigens to NKT cells.

Q: Which of the following regions may change due to somatic hypermutation of the DNA in a mature B cell…

A: Somatic hypermutation is a process that occurs in mature B cells during antigen activation, in which…

Q: Which of the following statements about innate lymphoid cells is true? (ONE ANSWER)   Require the…

A: Innate lymphoid cells (ILCs) are immune cells that lack a specific antigen receptor but can produce…

Q: The reason why therapeutic anti-IgE is able to suppress allergic responses is that _____. a.…

A: The immune system is what protects your body from sicknesses and infections. It's the real system…

Q: Match the term with its correct description Long, flexible molecule expressed on B-cells,…

A: B cells These are lymphocytes that are involved in the humoral immunity constituent of the adaptive…

Q: None

A: Monocytes are a type of white blood cell that plays a significant role in the immune system. They…

Q: CD4 cells are ___________ cells and CD8 cells are _________ cells.a. killer, suppressor b. helper,…

A: White blood cells (WBCs) play an important role in defending the body against antigens, like…

Q: 16. Expression of CD25 and CTLA-4 is a characteristic of? A. TH1 B. TH2 Treg

A: CD25 is a protein marker for CD4+ thymocytes. It hs actually the α-chain of the IL-2 receptor. CTLA4…

Q: The five classes of immunoglobulin differ in ….   Select one: a. None of the above b. Ability to…

A: Immunoglobulins are the antibodies that are produced from B-lymphocytes of plasma cells.…

Q: Helper T cells and dendritic cells activate ________  cells. ________  cells activate CD4 cells.…

A: Antibodies are proteins Y-shaped that bind to the foreign invaders of the body and signal to get to…

Q: An adult who has been thymectomized will have a T-cell repertoire that _____. a. resembles a…

A: The answer is described in the next step:-

Q: _______ involves successive rearrangement at the lightchain loci when reactivity to self antigen…

A: Answer is a.) Receptor Editing.

Q: Which of the following processes is not involved in central tolerance? Select one: A. Receptor…

A: Please follow step 2 for detailed explanation.

Q: A metabolically stressed epithelial cell expresses the protein MICits surface and then interacts…

A: NK cells are activated as an early event during an immune response and does not require the need for…

Q: Which of the following is not a possible mechanism for autoimmunity? Select one: A. Abnormal…

A: The immune system protects the body against illnesses and infections. It is composed of several…

Q: Barriers to using pig organs in human transplantation are _____. (Select all that apply.) a. the…

A: Graft rejection is one of the major problems in xenotransplantation. It is important to understand…

Q: The nucleus of B lymphocytes receives the signal indicating that the corresponding epitope was found…

A: The B lymphocyte (B cell) is indeed one of the body's most essential cells. By developing antibodies…

Q: Which of the following statements about Notch 1 is correct? (Select all that apply.) Select one or…

A: Concept used :  Notch 1 gene    Definitions required -  Notch 1 gene :  Notch one is a gene that…

Q: CD8 T cells in a culture are analyzed for their ability to produce the cytokine IFN-g, and the…

A: T cells are the essential component of immune system. These are developed in the bone marrow and…

Q: Which of the following is NOT a mechanism used by the immune system to fight multicellular…

A: Immunology is a section of biology that studies molecules, cells, and organs that build up the…

Q: Inflammatory cytokines a. act as opsonins. Ob. are produced only by phagocytic cells. c. facilitate…

A: Immunology is a section of biology that includes the study of molecules, cells, and organs that…

Q: Amino acid variation among MHC class II allotypes that present antigens to CD4 T cells is…

A: MHC or major histocompatibility complex is a set of genes. These genes are responsible for the…

Q: Naive B cells search for specific antigen displayed by follicular dendritic cells in primary…

A: T lymphocytes and B lymphocytes are the two major subtypes of lymphocytes. The T lymphocytes…

Q: T cells in the thymus are determined to be T helper cells or T killer cells while undergoing…

A: The immune system is a complicated physiological system comprised of several organs, tissues, and…

Q: Helper T cells do not _________. Select one: a. secrete cytokines that stimulate clonal selection…

A: The question is asking us to identify the function that Helper T cells do not perform.

Q: Complexes of IgG bound to soluble multivalent antigens can activate the classical pathway on the…

A: Introduction :- One of three mechanisms that activate the complement system, a component of the…

Q: In organ transplantation, minor histocompatibility antigens Select one: A. can trigger hyperacute…

A: Organ transplantation  Organ transplantation is a medical procedure in which the damage organ of the…

Q: Memory T cells _____. (Select all that apply.) a. must all be activated in secondary lymphoid…

A: Memory T cells are antigen-specific T cells that remain long-term after an infection has been…

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.