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For each of the following, identify the antibody or antibodies(if more than one) that meet each of the following criteria.Briefly (about one sentence or less) answer the follow-upquestion.

a)________ Only antibody formed in the absence of TH-B cellinteraction (T-independent pathway). What types of antigen allowthis mechanism of B cell activation? b)________ Able to activatethe complement cascade. What are three consequences of complementactivation?

c)________ Able to initiate ADCC. What happens during ADCC?

d)________ Able to opsonize a pathogen. What is another opsoninthat we talked about in Bio 221?

e)________ Main antibody secreted across mucosal surfaces. Howdo bacteria that use this portal of entry prevent this antibodyfrom finding them?

f)________ Used to prevent Rh- moms from being sensitizedagainst an Rh+ baby. Briefly explain how this type ofhypersensitive reaction could kill subsequent babies.

g)________ Found on the surface of a naïve B cell. What is a“naïve” B cell?

h)________ Responsible for the allergic response What happensduring the two exposures required for the allergic response? (>1sentence is OK)

i)________ Used in artificial passive immunizations What is thedifference between “active” and “passive” immunity? State someexamples.