A naive T cell is migrating from the blood into a lymph node and first rolls along high endothelial venules of the lymph node. Which of the following is expressed by the T cell to facilitate the rolling process?  A. C3a  B. CD4  C. ICAM-1  D. lgM  E. L-selectin

Q: Cells from mouse spleen were fixed and stain with CD4, which is found on T cells. Are the lighter…

A: In this scenario, cells from a mouse spleen are stained with an antibody targeting CD4, a protein…

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: What stimulates T-cell lymphocytes to undergo clonal selection?

A: Acquired immunity develops after birth. It is formed by B and T lymphocytes. B lymphocytes provide…

Q: Which ONE of the following markers is most commonly expressed on the surface of blast cells in…

A: Acute leukemia (ALL) may be a kind of cancer of the blood and bone marrow — the spongy tissue within…

Q: A macrophage phagocytizes an invading E. coli bacterium.  Select the type of MHC molecule that…

A: A macrophage is one of the cells of immune system which plays an important role in innate as well as…

Q: Identify the function of the Purkinje fibres. Select one: O a. O b. O c. O d. act as a pacemaker and…

A: The conducting system of heart consists of SA node, AV node, Right and left AV bundles, purkinje…

Q: 28. The molecules mediating signal transduction on a B-cell following antigen binding to BCR are…

A: B cell It is a type of lymphocyte which is involved in providing the humoral immunity component of…

Q: What molecule ensures that T-lymphocytes which encounter their antigen in the lymph node stay there…

A: T cell is a type of lymphocyte.T cells are one of the important white blood cells of the immune…

Q: The process of removing auto-reactive b and T cells during maturation is called: a. Clonal…

A: Clonal deletion is the removal through apoptosis of B cells and T cells that has expressed…

Q: Match the term with its correct description. Transcription factor required for T-cell development…

A: Introduction T-cells are the important immune cells that are developed in the Thymus. These are…

Q: What is one way that CD8+- cells are activated? A. by binding to a processed antigen on an MCH II…

A: White blood cells called CD8+ T cells are also referred to as cytotoxic T cells. These cells are…

Q: Which of the following cells is critically important in mounting an adaptive immune response?

A: Adaptive immune response is the response that is acquired by the body after exposure to a disease…

Q: Which of the following triggers or enhances an inflammatory response? Select one: a. lysozyme Ob.…

A: answer :  The one which can enhance an inflammatory response is  Option : e) Cytokines

Q: Which of the following is NOT a involved in the CD8-T-cell killing of viral-infected cells? Select…

A: In order to understand the role that CD8-T cells play in viral infections, it is important to first…

Q: Which of the following is not a function of antibodies? Select one: a. They neutralize pathogens by…

A: Introduction: The proteins that are produced in response to an antigen are called antibodies. It is…

Q: activation of a CD8-positive T lymphocyte requires presentation of antigen in association with which…

A: The activation of T lymphocytes, including CD8-positive T cells, is a crucial part of the immune…

Q: A patient has contracted an upper respiratory infection caused by a virus. Her initial adaptive…

A: Immunity is the body’s ability to resist and eliminate the potential harmful foreign invaders to…

Q: Name the 4 types of T cells and give the function of each one. (note: Suppressor T cell is also…

A: T cells are the lymphocytes and are of four main types: CD4+ helper cells, CD8+ cytotoxic cells,…

Q: What produces Autoantibodies? Select one: a. Macrophages b. Memory T cells c. Plasma B cells d.…

A: Antibodies (immune proteins) that mistakenly target and react with a person's own tissues or organs…

Q: During activation, there is a secondary exchange of signals between the presenting cell & activated…

A: During activation , there is a secondary exchange of signal between presenting cell and…

Q: The germinal center of a lymph node   a. Is the location of B cells undergoing clonal expansion…

A: Lymph nodes are small, bean-shaped glands that are the part of the lymphatic system. They are…

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

A:

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: When a helper T cell releases interleukin-1 to stimulate surrounding leukocytes, interleukin-1 is…

A: Several organs and processes of the body, which provide defiances from infection and toxins. The…

Q: The lymphatic system... A.Has a pumping mechanism to move fluid.  B. Includes areas of high…

A: Introduction:  The lymphatic system is the network of tissues, organs, and vessels that is…

Q: Which of the following is not used as a treatment for autoimmune diseases? Select one: A. Anti-IL2…

A: A defense system in the body of an individual which constitutes a complex network of cells and…

Q: Why are Helper T cells only responsive to antigen presenting cells (APC)?

A: Helper T cells are arguably the most important cells in adaptive immunity, as they are required for…

Q: Synthesis of antibodies is part of: a. Innate immunity b. Adaptive immunity c. Active Passive…

A: The resistance exhibited by the host towards injury caused by micro-organisms and other products is…

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…