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A naive T cell that encounters a co-stimulatory signal (signal two) without signal one will

[response1] T cells differentiate into T Helper cells and [response2] T cells become T Cytotoxic cells.

What is the role of histamine in hypersensitivity?

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

Activated CD4+ T cells produce and respond to interleukin-2 (IL-2).  This process is an example of:

Inclusion body formation and syncytia formation are two types of damage that occur to virally infected cells. What are they considered?

During viral assembly the capsid is the first portion of the virus that is constructed.

If a cell does not express a receptor for a virus the virus can still infect that cell.

Did you browse through the course shell and locate the weekly lectures, the PDF file of the Major Problems in American History reader, assignments, and study guides? Do you need help navigating the course shell? Explain.

Where does a viral envelope come from?