The germinal center of a lymph node   a. Is the location of B cells undergoing clonal expansion   b. Is the location of plasma cells   c. Is the location of B cells that have not yet contacted their antigen   d. In a micrograph, Is the light-colored center of an activated lymphoid follicle

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 does NOT describe humoral immunity? Group of answer choices a. Antibodies are secreted by…

A: everyday we are exposed to large number of infectious agent post op however only a few of these…

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: Mention the site in the body where the B-cells and T-cells are formed. Give one difference between…

A: Introduction: The immune system is involved in protecting the human body from any invading pathogen.…

Q: What class of antibodies is normally found in the mucosa of the respiratory tract? a. IG-A b. IG-D…

A: Antibodies are proteins produced and secreted by B cells. They bind to foreign substances, like…

Q: Outline the process of B-cell activation against a T-dependent antigen.

A: B cells, also known as B lymphocytes, are a type of white blood cell of the small lymphocyte…

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

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Q: interferons: a. cause inflammation b. inhibit viral infection c. aid in phagocytosis d. decrease…

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

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Q: Which of the following statements regarding negative selection of B cells is correct? a. Negative…

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Q: a. Describe the main elements of the process through which the immune system distinguishes self from…

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Q: At what stage of B cell development are autoreactive cells removed? A. stem cell stage B. pro-B…

A: These can be caused by pathogen or any other foreign agent. This function is carried out by the…

Q: Immune responses tailored to specific antigens involvea. T cells.b. macrophages.c. monocytes.d.…

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

Q: Describe what is assembled on the surface of pre-B cells.

A: Pre B cells are cells in the bone marrow that are progenators of the B cells that are a part of the…

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

A: The immune framework is an organization of natural cycles that shields a living being from…

Q: and T cells are activated by B cells are activated by a. soluble, intact antigens; antigen fragments…

A: 23. Option A is correct i.e, soluble, intact antigens; antigen fragments displayed on the surfaces…

Q: Which of these statements about T lymphocytes is false? a. Saome T cells promote the activity of B…

A: Lymphocytes are types of leukocytes. There are two types lymphocytes in immune system:…

Q: Describe how plasma cells attack antigens and how they can destroy an invading foreign cell. Compare…

A: In humans, immune cells are developed in the stem cells of bone marrow categorized as lymphocytes,…

Q: Explain each of the ways that the immune system has a mechanism of control in the development and…

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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: Contrast the structure of a B cell with that of a plasma cell, and explain how their structural…

A: B cells also called the B lymphocytes are kind of the white blood cells subtype. They play an…

Q: Upon reexposure to a pathogen, a memory B cell can differentiate to which cell type? a. CTL b. naïve…

A: Second line defence or non-specific defence is primarily dependent upon Neutrophils, macrophages and…

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

A:

Q: Positive selection of lymphocytes refers to the Select one: a. processing of an antigen by a…

A: The question is asking about the process of positive selection in the context of lymphocytes, which…

Q: Describe a mechanism by which an antigen can enter the lymph node and make contact with the B-cell…

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

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

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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…

Q: In what process is tumor necrosis factor (TNF) not involved?a. chemotaxis of phagocytesb. fever c.…

A: Tumor necrosis factor (TNF) is produced by macrophages, lymphocytes, and other immune cells as an…

Q: Which pertains to the immune response of a woman who has just inhaled a coronavirus to which she has…

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Q: Which event happens first during cytotoxic T-cell activation?

A: INTRODUCTION;-  The activation of cytotoxic T cell is dependent on several simultaneous interactions…

Q: In our body , there occurs a major problem called chronic deletion if self- lymphocytes are not…

A: Aberrations change the chromosome arrangement but do not change the number of chromosomes. The…

Q: A.S. was recently diagnosed with Hodgkin disease and scheduled for a staging procedure. His previous…

A: Hodgkin’s lymphoma is the cancer of lymphatic system and progresses along lymphatic pathways. It is…

Q: The largest and most effective of the phagocytes are:  a. red blood cells b. lymph nodes c.…

A: Question- The largest and most effective of the phagocytes are:  a. red blood cells b. lymph nodes…

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Q: A naive T cell is migrating from the blood into a lymph node and first rolls along high endothelial…

A: T-lymphocytes are produced from the bone marrow and maturated in the thymus. They express T-cell…

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.