Exam 1 Multiple Choice

CD4+

Which T-Lymphocyte is the helper cell?

CD8+

Which T-Lymphocyte is the suppressor/cytotoxic cell?

IgM

Large antibody, called a macroglobulin

Very efficient combining with fungi

Higher levels of this predicts the existence of viral infection

IgG

Smaller antibody

Principal antibody molecule formed in response to the majority of infectious agents

They will cross the placenta

IgA

Produced by antibody-forming cells located in the respiratory and gastrointestinal mucosa

Present in breast milk for building immunity of the child

It combines with harmful ingested or inhaled antigens, forming antigen-antibody complexes that cannot be absorbed

IgD

Found on cell membrane of B lymphocytes and used in blood grouping

IgE

Found in minute quantities in blood but its concentration is greatly increased in allergic individuals