Flashcards in Microbiology Deck (187)
What is the function of B lymphocytes?
independently able to indentify foreign antigens and differentiate into antibody producing plasma and memory cells
What chemical produced by the body stimulates B lymphocytes?
What is the role of T lymphocytes?
T helper cells induce B lymphocytes. T suppressor cells recognize and kill virus-infected cells
What is the function of natural killer cells?
cell that bond to and lyse other cells especially virally-infected cells
What is the principal immunoglobulin in exocrine secretions (e.g. breast milk, respiratory and intestinal mucus, saliva, tears)?
What immunoglobulin can move across the placenta thus becoming an important immunoglobulin for newborns?
What is the main immunoglobulin in serum?
What immunoglobulin activates complement and is important in opsonization?
What immunoglobulin attaches to mast cells in the respiratory and intestinal tracts and plays a role in allergic responses?
What immunoglobulin is the first to form in response to an infection?
What immunoglobulin controls the A, B, O blood group antibody response?
Antigens present on all nucleated cells in the body that identify a cell as self are called what?
What is a hapten?
substance that normally does not act as an antigen
Complement is activated in what kind of immune response?
B-cell mediated immune response
What kind of proteins are involved in vasodilation, chemotaxis, opsonization of antigens, lysis of cells and blood clotting?
What is opsonization?
coat placed on cells so that they can be recognized
What role does interferon play?
interferon is released when invading organisms are viral. They inhibit the production of virally infected cells, prevent viral spread, enhance activity of macrophages, NK cells, cytotoxic T cells and inhibit tumor growth
Which interleukin permits cells of the immune system to talk to one another and intimate responses?
Which interleukin promotes cellular immunity ie. promote growth and activity of macrophages and B cells?
Which interleukins promote humoral immunity?
IL 4, 5, 10
Antibodies are produced in what type of immunity?
Hayfever is what type of hypersensitivity reaction?
IgE is formed in what type of hypersensitivity reaction?
The reaction of antigens and antibodies at cell surfaces is what type of hypersensitivity reaction?
The reaction to blood transfusions would be what type of hypersensitivity reaction?
The reaction os antigen and antibody in extracellular fluid spaces is what type of hypersensitivity reaction?
A cell mediated or delayed reaction meditated by the interaction of antigen and T lymphocytes and subsequent release of lymphokines is an example of what type of immunity?
Tuberculosis is an example of what type of hypersensitivity reaction?
Loss of normal tolerance by the immune system of "self" antigens on the surface of the body's cells and destruction of normal tissue with autoantibodies is defined as what?