During thymic education, what cells are subject to positive selection?

After binding to antigen, antibodies are capable of providing each of the following types of defense, except one.  Which one?

Answer these three questions regarding Fc receptors.  Please number your answers.1. What is the ligand for these receptors?2. There are two categories of Fc receptor, and they function slightly differently.  Explain the difference.3. Pick a cell that expresses an Fc receptor, and explain the defensive advantage and function it gains from expressing that receptor.

Which one of the following cells is considered part of the innate immune system?

Of the following cells, which one is not myeloid?

Antibody class switching requires appropriate cytokine stimulation.  What cytokines are most important for driving B cell class switching to…  IgG that is capable of activating complement? IgE?

Regarding the tissue represented in the figure, the identity of the region labeled A is…

What is a molecule that can be expressed on an APC and that can provide costimulation to a T cell?

To generate effector cells from a naive mature T cell, activation signals 1 and 2 must be received from a professional APC, but then a third signal is also needed.  Please label your answers (1-2). 1. In what form is this third signal delivered?   2. What is the function of this third signal?

The structures of IgM and IgA contain a component that no other antibodies contain.  This structural component provides for specific binding to a receptor.  Please label your answers (1-4). 1. What is the structural component? 2. What is the receptor that can be bound by the antibodies due to the structural component, above? 3. Binding to this receptor facilitates what to be done with these antibodies (something that is not done to any other antibodies)? 4. In what tissue is this receptor most commonly found?