The plant foxglove produces a toxin that kill animals. Ingestion of this toxin causes heart dysfunction by allowing the distribution of sodium and potassium ions across the cell membrane to reach equilibrium. Which protein is likely to be inhibited by this toxin?

In an experiment, a researcher injects a mouse with an antigen.  This exposure will result in a specific immune response to the antigen.  Which of the following best explains the origin of the antigen binding receptors on the stimulated lymphocytes?  

There is an organ unique to birds where B cells are educated.  Which of the following is the name of this organ?  

Clonal selection, resulting in an immune response, always occurs in which of the following scenarios?

Which of the following best explains phagocytosis?

Which of the following best explains the function of secondary lymphoid organs?

During immunological development, T cells undergo a maturation process.  When fully mature, all T cells have which of the following markers?

Write three sentences in Spanish using the “se” impersonal to give advice about healthy lifestyles and good habits. Think about things like eating, exercising, or other ways to stay healthy. Your sentences should describe general actions that people do (or should do) without referring to specific individuals.   Ex. “Se come comida saludable.” 

A special contractual situation in which the parties to a disputed contract agree to settle their dispute by changing the obligations of the contract itself with the new agreement.

The law firm of Piedmont & Dreyer enter into an agreement with Rhett to represent him in pending litigation against his former employer. Is this contract covered by the UCC?