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 is true about the immune system? check all that apply. a. cd8 t cells…

A: Introduction The main function of the immune system is to protect us from foreign substances and…

Q: Which of the following is a characteristic of T cell receptors?

A: Only on the cell membrane are T-cell antigen receptors to be located. Because it is made up of two…

Q: Mark the following statements as true or false. If a statement is false, correct is to make a true…

A: A)  true B) false,  secondary immunue response is controlled by T- cells

Q: All of the following are examples of how tumors or the microenvironment in which they develop…

A: Tumor cells are able to stimulate specific adaptive immune responses. However, most frequently these…

Q: A second exposure to a given foreign antigen elicits a rapid and pronounced immune response…

A: Immunity is the capability of the body to fight against foreign attack and maintain the persistence…

Q: antigen presenting cells are necessary for ___ response to a foriegn antigen a. b lyphocyte b. t…

A: Innate immune responses are not specific while adaptive immune responses are specific immune…

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: Natural killer cellsa. are known for attacking large parasites, such as tapeworms.b. engulf…

A: Natural Killer cells also called large granular lymphocytes are a type of white blood cell. It is a…

Q: During the adaptive immune response, the role of helper T cells includes _____. Mark all that…

A: The adaptive immune response is the body's defense mechanism that learns and adapts to specific…

Q: All of the following occur after B cells leave the bone marrow except a. peripheral tolerance b.…

A: The lymphoid cell production and maturation follow the transition from primary to secondary lymphoid…

Q: All of the following are characteristic of regulatory T cells except a. they express CD25 b.…

A: BASIC INFORMATION  IMMUNE SYSTEM  It defends our body from the foreign particles which can cause…

Q: During positive selection, if the selecting MHC molecule is class I, then a. gene expression of…

A: Positive selection refers to the event in which T cells become largely specified to develop…

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: All of the following are properties of B-1 cells except a. They exhibit polyspecificity. b. They…

A: B1 cell is a type of B lymphocyte that is accountable for producing a humoral immune response. They…

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 statements regarding intraepithelial lymphocytes is false? (Select all that…

A: BASIC INFORMATION IMMUNE SYSTEM  It defends our body from the foreign particles which can cause…

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: When an immature dendritic cell becomes an activated dendritic cell, all of the following changes…

A: Immunity is the capability of the body to fight against foreign attack and maintain the persistence…

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: Which of the following is false about HLA class I molecules? A. They are encoded by multiple and…

A: INTRODUCTION HLA Human leukocyte antigen, when a cell is infected with virus or any harmful agent…

Q: To become a fully activated, antibody-secreting cell, B cells usually need: a. to encounter an…

A:

Q: The detrimental effects of Lupus erythematosis are initiated by A. activated T cells attacking…

A: Lupus erythematosus: It is an auto-immune disease, in which the human immune system kills its own…

Q: A drug that were to inhibit the activity of T suppressor cells would lead to _______. a.…

A: Regulatory T cells (Tregs) also known as supressor t cell are a specialized subpopulation of T cells…

Q: When endogenous antigens "blend in"( i.e establish a presence on the cell membrane) between the…

A: An antigen is a molecule that stimulates the production of an antibody to generate an immune…

Q: Upon further testing, it is found that Matthew in question 4 does have normal cellular immunity.…

A: Antibody

Q: The primary role of complement control proteins that operate in the early stages of complement…

A: In response to antigenic stimulation, antibodies are produced which are immunoglobulins. The…

Q: Generally, in healthy individuals and in the absence of infection, a mature naive T cell that…

A: T cells are among the immune system's most essential white blood cells that play a key part in…

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: MHC moleculesa. are glycoproteins.b. attach to the plasma membrane.c. have a variable region that…

A: MHC MOLECULES  ( e ) all of these are correct MHC ( major histocompatibility complex ) molecules are…

Q: NK cells express _____. a. receptors to recognize alterations to human cell surfaces induced by…

A: Natural killer (NK) cells are lymphocyte that descend from the very same progenitor as T and B…

Q: How does IL-2 affect T-cells? Select all the mechanisms in T-cells that utilize IL-2 Select one or…

A: Introduction  Interleukin-2 (IL-2) is a type of cytokine and it acts as a signaling molecule in our…

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: Select all of the statements that are true about the grey cell shown in the image. A. This cell is a…

A: In order to protect the body from dangerous invaders like bacteria, viruses, fungi, and parasites as…

Q: For question with blanks, choose the combination of answers that most accurately completes the…

A: The immune system provides protection against invading pathogens in the human body. There are two…

Q: Which of the following is NOT an explanation to the body's normal lack of mature lymphocytes that…

A: Lymphocytes develop in the Central lymphoid organ such as thymus and bone marrow. The main  criteria…

Q: Explain why each choice (a-d) is correct or incorrect.  Which of the following examples below…

A: An autoimmune disease is a condition in which your immune system erroneously attacks your body. The…

Q: Which of the following is false about innate immune receptors? A. They are encoded by intact genes…

A: Innate immunity is the immunity that involves protective barriers. They prevent the entry of foreign…

Q: If a T-cell receptor on a double-positive thymocyte binds to a self-peptide:self-MHC class I complex…

A: The immune system is the shield of the body that protects it from outside intruders, like…

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.