Cytotoxic T cells that lack expression of perforin are more defective in killing target cells than those that lack granzymes

Which of the following correctly describes events necessary for naive T cell entry in to the lymph node?

The pre-B cell receptor consists of:

The pre-B-cell receptor provides an important signal that induces transition of pro-B cells to pre-B cells. An important characteristic of this receptor is that:

A disaster is best defined as:

The expression of rearranged heavy chain in B cells is “checked” for successful rearrangement by which of the following molecules?

If an antigen (cooties A) is injected into the thymus of fetal mice, this will induce a large increase in peripheral T cells able to respond to APC’s presenting MHC:Cooties A peptides

 Mice with a genetic defect, after analysis of their lymph nodes, revealed profound alterations in the normal architecture, with a lack of organization of distinct T-cell and B-cell zones. A likely candidate for the defect in these mice is

At what rate should the nurse set the IV pump for the following order: 250 mL of D5W to be administered over 40 minutes?

Which of the following statements is true about disaster preparedness?