In order to have a strong adaptive immune response, cells of the innate immune system need to work closely with cells of the adaptive immune system.  Which of the following combinations is the best example of innate cells interacting with cells from the adaptive immune system to increase an adaptive immune response?

Polymorphonuclear cells (PMNs) are activated when exposed to antigen.  Which of the following best explains the changes in PMNs following activation?

One of the earliest immune receptors to evolve is the Toll-like receptor (TLR).  Which of the following best describes TLRs?

Members of the immunoglobulin superfamily are involved in the recognition, binding, and adhesion processes of cells.  They share structural features with immunoglobulins, including characteristic domains and folds.  Which of the following is a member of the immunoglobulin superfamily?

The major histocompatibility complex (MHC) is best described by which of the following statments?

A 65-year-old man goes to the doctor with a severe backache.  He is diagnosed with ankylosing spondylitis, an arthritic disease that is considered linked to HLA B27.  Which of the following best explains the meaning of ankylosing spondylitis being linked to HLA B27?

Which of the following statements best describe cytokines?

Macrophage have surface molecules that can be directly engaged by certain bacteria.  This interaction then leads to the immediate triggering of signal pathways, promoting phagocytosis. Which of the following is the most accurate term for these receptors?

The act passed by Congress to enforce prohibition was the 

Object A moves along the +x-axis, while Object B moves along the -x-axis. The figure shows the position versus time for both objects. At t = 0, Object A is at x = 0 with a constant speed of 1 m/s (blue line). Object B is initially at x2 =100 m moving at a constant speed of 2 m/s (red line). Determine the position x1 (in meters) where A and B meet.