This era of man was marked by the use of tools

Which of the following is NOT a mechanism used as part of the innate immune system?

If someone received an injection of antibodies, which type of immunity is involved?

Substances that are recognized as foreign by the immune system and provoke an immune response are called:

Which type of cells decrease the immune response and help protect against autoimmune conditions?

Which of the following does NOT describe natural killer cells?

Certain antibodies bind to the surface of a virus molecule.  This action prevents the virus from entering one of our own cells.  Which antibody function is being described in this example?  

Which of the following does NOT describe memory cells?

True or False?  Cytokines are small proteins that act as chemical messengers between various parts of the immune system.

Which of the following is TRUE concerning albumin?