Formation of a distinct head is called 

After a sperm fertilizes an egg, the zygote undergoes

List the 3 steps required for the differentiation of T helper cells into T helper cell subsets.

The loss of Immature B-cells bearing self-antigen occurs in the and is referred to as tolerance.

Which of the following represents the earliest Stage in T cell development?

Which of the following molecules would double negative T cells fail to express?

Cells destined for the T cell lineage are “educated” in the thymus.  List 3 important goals of thymic education (5 pts).

Cannibalistic behavior can be seen in which two farm species? 

What is the role of histamine in hypersensitivity?

Follicular helper T cells are a recent discovery in the Helper T cell lineage.  What is the primary role of follicular helper T cells?