T cells that react with self antigens are destroyed through: A. cytokinesis b. macrophages c. perforins d. apoptosis

Q: Which of the following pairs is mismatched? a. activation of memory cells: secondary immune…

A: Explanation given for the mismatch pair.

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: contrast cytotoxic T cells and NK cells

A: Natural killer cells (NKC) and cytotoxic T cells are two different lineages of immune cells that…

Q: Cell-mediated immune response includes the following except to ______. A. activate B lymphocyte B.…

A: Cell mediated immune response is carried out by T lymohocytes of our immune system. It is an 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: Which of the following is both a phagocyte and an antigen-presenting cell? a. NK cell b. eosinophil…

A: An Antigen Presenting Cell, like a macrophage, engulfs and digests a foreign bacteria. An antigen by…

Q: Phagocytes move through capillary walls by squeezing between adjacent endothelial cells, a process…

A: Answer is a.)  diapedesis.

Q: B cells are responsible for (a) cell-mediated immunity. (b) immune surveillance. (c)…

A: Immunology is the branch of medical science that deals with the study of the immune system and…

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: How could you distinguish the type of T cell that is active in an immune response? In other words…

A: Macrophages are the first cell types to respond to infection. If a macrophage encounters a foreign…

Q: Using the letters from column B, match the cell description in column A. (Note that all require more…

A: Different immune cells are involved in mediating protection to the host against the pathogen. There…

Q: In what process is clonal selection important?a. Complement function c. Inflammationb. B cell…

A: Clonal selection is a process that explains how a single B or T cell that recognizes an antigen…

Q: Stem cells responsible for the process of lymphopoiesis are located in the (a) thymus and spleen.…

A: Lymphocytes are white blood cells responsible for defending the body from pathogens and other…

Q: Name the 3 major sub-types of T-lymphocytes: a. (a) ___________________ (b) ___________________ (c)…

A:

Q: T cells that secrete cytokines that help antibodyresponses are called ________.a. Th1b. Th2c.…

A: T cells are also known as T lymphocytes as they are produced and mature in the thymus. They are an…

Q: What is the difference between a T-cell-dependent and T-cell- independent response?

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

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: match the cytokine with its description. 1.Interleukin-1 2.Interleukin-2 3.Interleukin-12   a.…

A: Interleukins (IL) are chemical substances that play a vital role in varied rules of the immune…

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: 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: 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: CD4 markers are associated with (a) cytotoxic cells. (b) suppressor cells. (c) helper T cells. (d)…

A: The T-Cell (T lymphocyte) receptors are the antigen-specific receptors. There are two transmembrane…

Q: Receptors that trigger innate immune responses a. are antibodies recognizing specific antigens.…

A: The first line of defense against invading pathogens is the innate immune response. They are also…

Q: Which of these cell types aids the activation of T lymphocytes by antigens? a. Macrophages b.…

A: The immune system of a body is broadly classified into innate and acquired type. Innate immunity is…

Q: in antibody-mediated immunity, what happens immediately after B cells are activated? a. the foreign…

A: The immune system of the body fights against foreign invaders and protect the body from infections.…

Q: What problems would arise if a person had a hereditary deficiency that resulted in an inability to…

A: Malnutrition is the key component which cause immunodeficiency. It occur when one or more…

Q: Which of the following can NOT be found in the lymph node? a. Lymph follicle b. White pulp c. Cortex…

A: Lymph nodes contain a large concentration of white blood cells known as lymphocytes, which aid in…

Q: Which of the following is not a consequence of activation of the complement system? Select one: a.…

A: Activation of the complement system cause increase and efficient proteolytic cascades that end in…

Q: One of the common characteristics of lymphocytes (1), neutrophils, and macrophages) the resulting…

A: In the human body, the resistance against the entry of any foreign particle or antigens is executed…

Q: Compare and contrast T and B cells

A: The T cells are referred to as thymus cells and B cells are referred to as bone marrow (mammals) or…

Q: Which of the following pairs is mismatched? a. T-cell activation: cell division and…

A: T-cells are white blood cells that take part in the cell-mediated immune response. T-cells are part…

Q: which of the following cells secrete cytokines that activate B cells, T cells, and macrophages? a. T…

A: The immune cells can be categorized into neutrophils, basophils, eosinophils, monocytes,…

Q: Suppose a person recovers normally from viral infections, but then gets the same viral infections…

A: The B-lymphocytes or the B-cell and the the T-lymphocytes are t-cells are very important for the the…

Q: What is the function of cytotoxic T-cells?

A: Acquired immunity develops after birth. It is provided by B and T lymphocytes.

Q: Which of the following statements regarding T cells activated by specific antigen is incorrect? a.…

A: Lymphocytes are involved in adaptive immune responses.

Q: In a normal individual, a T cell that interacts with a self-antigen in the thymus will more than…

A: Introduction  Immunity is the property or ability of the body to defend against the pathogens.…

Q: of the choices, which cells stimulate directly B cells to divide and produce antibodies? a. mast…

A: The immune system provides defense against invading pathogens. It is a complex network of cells,…

Q: Select the type of T cell that plays a role in diminshing an immune response:

A: T cell or T lymphocyte, is a vital component of the immune system. When it comes to protecting the…

Q: Virus-infected cells are detected and destroyed by which cells of the immune system? A)helper T…

A: C)-cytotoxic T cells

Q: An essential property of the immune system is self-regulation. An immune response that is not…

A: Introduction A disorder in which your immune system wrongly targets your body is known as autoimmune…

Q: Describe how helper T-lymphocytes play a pivotal role in a healthy, normally functioning immune…

A: Introduction: Immunity is referred to as the host's resistance against any foreign antigen,…

Q: Which of the following should be the same inidentical twins?(A) the set of antibodies produced(B)…

A: The term MHC denotes Major Histocompatibility complex molecule. This molecule is the host protein…

Q: The processes of clonal selection and clonal expansion occur during _____. a. adaptive immune…

A: The immune system functions as a defense mechanism for humans and protects them from foreign…

Q: Which of the following pairs is mismatched? a. plasma cell: mediation of phagocytosis and killing…

A: The immune system is a defense mechanism used by humans to protect the body from foreign invaders.…