When a single B cell specific for an antigen activates and then replicates over and over to produce a selection of genetically-identical cells to fight the threat, it is called ______.

How is hemolytic disease of the newborn (a type II hypersensitivity reaction against Rh factor) prevented today? Please describe what the medication is called and how that medication works to prevent the disease in newborns.

Lymph nodes serve as sites in the body where white blood cells can scan for potential infection.

TH cells are informed to become TH cell subsets (TH1, TH2, TH17…etc.) prior to clonal expansion by _________.

You are studying a newly identified infectious disease within a population. Think of the typical graph of the course of infection-incubation period through to convalescent period. The new disease reveals a course of infection characterized by fluctuating symptoms, with intermittent periods of invasion (acute period) between asymptomatic periods. The whole course of infection occurs over a period of months or even years. Based upon the information presented, select the statement that most accurately reflects this new infectious disease.

IgG antibody can be given as immunotherapy to help individuals that cannot make antibody on their own. This would be an example of artificial, active immunity.

Which of the following autoimmune diseases results when a type II response is raised against thyroid-stimulating hormones, produced by the thyroid gland? 

Patients with SCID lack both B and T cells.

Exudate is tissue swelling caused by edema leaking from inflamed blood vessels.

Unlike anaphylaxis, serum sickness & the Arthus reaction do not depend on IgE antibodies.