The initial encounter with an allergen is called the ________.

A person who is Rh– will have anti-Rh antibodies in their serum from early infancy.

________ is the most abundant class of antibodies in serum.

B lymphocytes and T lymphocytes mature in the thymus gland.

The human microbiome is considered an important component of the first line of defense.  Which statement adequately reflects its role as a defensive barrier?

________ is the most abundant class of antibodies in serum.

The human microbiome is considered an important component of the first line of defense.  Which statement adequately reflects its role as a defensive barrier?

Class I MHC genes code for ________.

FISH and microarrays both use probes to hybridize to sequences of the pathogen genome.  They differ in that ________.

The immunoglobulin class that has an Fc region that binds to receptors on basophils and mast cells is ________.