Which cells stimulate both arms of the immune response?

How does the formation of an antigen–antibody complex cause the elimination of an antigen?

Name the five classes of immunoglobulins. Which is most likely to be found attached to a B cell membrane? Which is most abundant in plasma? Which is important in allergic responses? Which is the first Ig to be released during the primary response? Which can cross the placental barrier?

Name the five antibody classes and describe where each is most likely to be found in the body.

Differentiate between a primary and a secondary immune response. Which is more rapid and why?

Antibodies released by plasma cells are involved ina. humoral immunity,b. immediate hypersensitivity reactions,c. autoimmune disorders,d. all of the above.

An investigator at a crime scene discovers some body fluid on the victim's clothing. The investigator carefully takes a sample and sends it to the crime lab for analysis. On the basis of the analysis of antibodies, could the crime lab determine whether the sample is blood plasma or semen? Explain.

Which immune cell is able to respond quickly after any subsequent encounter with the same antigen?