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Flashcards in Microbiology Deck (187)
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151

What is the function of B lymphocytes?

independently able to indentify foreign antigens and differentiate into antibody producing plasma and memory cells

152

What chemical produced by the body stimulates B lymphocytes?

IL-2

153

What is the role of T lymphocytes?

T helper cells induce B lymphocytes. T suppressor cells recognize and kill virus-infected cells

154

What is the function of natural killer cells?

cell that bond to and lyse other cells especially virally-infected cells

155

What is the principal immunoglobulin in exocrine secretions (e.g. breast milk, respiratory and intestinal mucus, saliva, tears)?

IgA

156

What immunoglobulin can move across the placenta thus becoming an important immunoglobulin for newborns?

IgG

157

What is the main immunoglobulin in serum?

IgG

158

What immunoglobulin activates complement and is important in opsonization?

IgG

159

What immunoglobulin attaches to mast cells in the respiratory and intestinal tracts and plays a role in allergic responses?

IgE

160

What immunoglobulin is the first to form in response to an infection?

IgM

161

What immunoglobulin controls the A, B, O blood group antibody response?

IgM

162

Antigens present on all nucleated cells in the body that identify a cell as self are called what?

HLA

163

What is a hapten?

substance that normally does not act as an antigen

164

Complement is activated in what kind of immune response?

B-cell mediated immune response

165

What kind of proteins are involved in vasodilation, chemotaxis, opsonization of antigens, lysis of cells and blood clotting?

complement

166

What is opsonization?

coat placed on cells so that they can be recognized

167

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

168

Which interleukin permits cells of the immune system to talk to one another and intimate responses?

IL 1

169

Which interleukin promotes cellular immunity ie. promote growth and activity of macrophages and B cells?

IL 2

170

Which interleukins promote humoral immunity?

IL 4, 5, 10

171

Antibodies are produced in what type of immunity?

humoral

172

Hayfever is what type of hypersensitivity reaction?

Type 1

173

IgE is formed in what type of hypersensitivity reaction?

type 1

174

The reaction of antigens and antibodies at cell surfaces is what type of hypersensitivity reaction?

Type 2

175

The reaction to blood transfusions would be what type of hypersensitivity reaction?

Type 2

176

The reaction os antigen and antibody in extracellular fluid spaces is what type of hypersensitivity reaction?

Type 3

177

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?

Type 4

178

Tuberculosis is an example of what type of hypersensitivity reaction?

Type 4

179

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?

autoimmunity

180

What is the name of genital warts?

condyloma accuminata