Electrophoresis is defined as:

Consider a patient with a very high level of serum antibody directed against a viral pathogen; determination of the antibody titer using a precipitation assay produces a negative result with 1/2 and 1/4 dilutions of patient serum, but produces a strong result with 1/8 and 1/26 and higher.  This result is related to antibody excess in the patient serum and is referred to as:

Natural Killer cells are similar to cytotoxic T cells, but how are they different? 

You have performed a titer of an antibody present in serum, which produces agglutination. The last test tube to show agglutination is tube 5, the 1/16 dilution. You would report out a titer of:

The precipitation reaction is a serologic method in which:

Which of the following is a characteristic of the humoral immune response?

Up to the point where C5 is produced in the complement pathway, the pathway can best be described as:

Once a naive T cell enters the interfollicular area of a lymph node, the T cell:

Which of the following refers to the bond strength between the epitope and the FAB regions of the corresponding antibody?

Which of the following is primarily responsible for the changes seen in the secondary immune response in comparison to the primary response?