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An infection that is at first confined to a specific area of the body but then moves throughout the body to other sites.
Inanimate materials that commonly serve as a source of infectious agents, such as food, air, blood.
An immunoglobulin is made up of four polypeptide chains, two heavy and two light. The hypervariable region which binds the antigen lies
in the FAb
Surface receptors on immune system cells function in
identification of self/nonself, communication, and cell development
_______ are large glycoprotein molecules that serve as the specific receptors of B cells and as antibodies.
The only immunoglobin that is secreted outside of tissues (found in tears, saliva, mucus, and colostrums), secretory is a dimer held together by a J chain.
_________ are the result of B cell activation and secrete specific antibody. They are large, specialized, and the most numerous of B cell progeny.
T/F. The two features that most characterize the third line of defense are sensitivity and memory.
T/F. The Clonal Selection Theory says that early undifferentiated monocytes in the embryo and fetus undergo a continuous series of divisions and genetic changes that generate hundreds of millions of different cell types, each carrying a particular receptor specificity.
T/F Immunogens are proteins or other complex molecules of high molecular weight that trigger the immune response in the host.
T/F APCs function by binding foreign antigen to their cell surfaces for presentation to neutrophils for phagocytosis.
T/F The memory response means that the second exposure to an antigen calls forth a much faster and more vigorous response than the first.
T/F Attenuation is any process that kills a virus or bacteria to negate its virulence during vaccine production.
T/F Vaccination programs seek to protect the individual directly through raising the antibody titer and indirectly through the development of herd immunity.
A healthy functioning immune system is responsible for all of the following except one. Identify the function that is NOT one of the roles of the immune system.
creation of barriers to deter the invasion of microbes
____ provides an auxiliary route for the return of extracellular fluid to the circulatory system proper.
The lymphatic system
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