What is one way that CD8+- cells are activated? A. by binding to a processed antigen on an MCH II protein located on a dendritic cell B. By interacting with a free floating antigen C. By binding to an antibody and secreting cytokines D. Th cells can produce cytokines to help activate CD8+- cells E. By phagocytosis of a bacteria

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: b Production of complement c. Production of IL-6 d. Production of CRP e. All of the above 41. NK…

A: Hey, since there are multiple questions posted, we will answer first two questions (41 and 42). If…

Q: MHC class I molecules present peptide antigens derived from a(n) _______ compartment, whereas MHC…

A: (Major histocompatibility complex). They play vital role in intercellular recognition and…

Q: Write of the following statements is correct?  A. Antigen fragments that bind to MHC class I…

A: Freshly formed proteins that fail to fold or blend properly into the endoplasmic reticulum will be…

Q: pattern recognition receptor is cell receptor on a. cytokine b. monocyte c. epitope d. A and B

A: Pattern recognition receptor is found on the cells in our immune system.

Q: Which of the following statements is INCORRECT regarding memory B cells? a. Memory B cells express…

A: B cells are a part of adaptive immune response. B cells have B cell receptors (BCRs) on their…

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: uch of the following best defines MHC restriction? Select one: a. The TCR recognizes a particular…

A: Concept used -  T cell receptors and MHC restriction    Important definitions-  MHC restriction :…

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: Match the appropriate term on the left with the appropriate definition of the right…

A: The immune system protects us from pathogenic infections.

Q: All of the following have been observed in individuals deficient in either CD3δ or CD3ε except a.…

A: Answer: Introduction: CD3 means a cluster of differentiation is a complex of proteins and T- cell…

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: What is the predicted outcome if a patient receives an allogeneic hematopoietic cell transplant from…

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

Q: All of the following apply to allergic responses (Type I Hypersensitivities) EXCEPT: (choose what…

A: Allergic reactions, especially Type I hypersensitivity reactions, are a typical immune system…

Q: 29. T-cell dependent antigens can a. directly stimulate B cells to multiply and produce antibodies…

A: The correct answer is (c) restrict antibody formation. T-cell dependent antigens require the help of…

Q: 10. NK cells recognize and kill abnormal host cells that are: A. opsonized with IgE. B. lacking…

A: According to bartleby expert guidelines, when multiple questions are posted we are allowed to answer…

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A: The body's defence mechanism against allergens, autoimmunity, and venom is hypersensitivity. Pollen,…

Q: The following are steps in the cell-mediated inflammatory response. Put them in the correct order.…

A: Cell-mediated immunity is an immune response resulting from the activation of cells of immune-system…

Q: Compare and contrast the five classes of CD4T helper cells. Include in your response references to…

A: A controlled, efficient immune response to infections depends on CD4+T cells.

Q: Identify which of the following is not a characteristic of belatacept. a. contains part of CTLA4…

A: Belatacept is a new immunosuppressive therapy designed that improves the clinical outcomes of kidney…

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: 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: 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…

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A: A metalloproteinase is also known as metalloprotease. It is a type of protease enzyme that requires…

Q: A. vagina B. trachea and bronchi C. skin D. stomach E. mouth select A B C D E 1. villi pushing…

A: 1) vagina - low pH , antibodies and secretions  2) trachea and bronchi - villi pushing material…

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: 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: Which of the following statements regarding CD4 is incorrect? a. MHC class II molecules present…

A: CD4 could be a monomeric kind I transmembrane compound protein consisting of 4 Ig-like extracellular…

Q: 14. Predominant cell types involved in the humoral immune response are: A. eosinophils. В.…

A: Answer No 14 -- Humoral Immunity -- There are two types of immune responses             ( i )…

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: 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: 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: Immature B cells specific for monovalent self antigens encountered in the bone marrow a. enter a…

A: Immunity can be defined as the ability of an organism to fight against infections caused by a…

Q: Which of the following statements regarding TLR4 is false? (Select all that apply.) a. TLR4 is a…

A: The Toll-like receptor 4 (TLR4) are transmembrane receptor expressed by immune cells on their…

Q: Match the T-cell component in Column A with its description in Column B. Use each description only…

A: The match the column with respect to t cells are as follows:

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: 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 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: 1. In central tolerance, 3 mechanisms deviate B cells away from making autoreactive antibody. Which…

A: These are multiple choice questions.

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: Select all of the pathways that can activate without antibodies.   A. Alternative   B. Lectin…

A: Alternate pathway is a type of complement pathway in which pathogens are Opsonized and killed.…

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: Why are CD8+/αβT-cells important? Explain the function of the mature activated CD8+/αβT-cell and…

A: White blood cells also called leukocytes, are the cells of the immune system that are involved in…

Q: During the secondary immune response, in the serum you would expect a. to find a greater…

A: Introduction The secondary immune response occurs on repeated antigen exposures, with a stronger…

Defense Mechanism

Circumstances influence and compel people to behave in a certain way. One such behavior is a defense mechanism. It is employed by people to escape from unpleasant circumstances, thoughts and actions. Defense mechanisms are, thus, psychological strategies that help to avert and avoid unwanted feelings such as guilt or shame and situations such as threat and danger.