21. The Immune System

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 antibody class is abundant in body secretions?

a. IgA

b. IgD

c. IgE

d. IgG

e. IgM

An anesthesia technician is advised that she should be vaccinated against hepatitis B, which is caused by a virus. She is given one injection and is told to come back for a second injection in a month and a third injection after 6 months. Why is this series of injections necessary?

T cells and B cells are produced in the:

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

More than one choice may apply.

Which of these antibody classes is usually arranged as a pentamer?

a. IgG

b. IgM

c IgA

d. IgD

Your friend tests her snake-wrangling skills on an eastern diamondback rattlesnake, and is bitten and envenomated (injected with the snake's venom). In the emergency department, doctors administer the antivenin CroFab, which contains antibodies to the toxins in snake venom. Is this an example of active or passive immunity? Will this confer any lasting protection to your friend?