In ______________________ mediated immunity, T cells directly attack the invading antigen like foot soldiers in hand to hand or “cell to cell” combat.

The complement system is composed of a number of inactive proteins found in the plasma and on the plasma membranes of cells. When activated these proteins have three primary roles. Opsonization is the:

All of the following are signs or symptoms of inflammation EXCEPT:

Sweat glands help discourage microbes on the skin by “washing” them off the surface.

The movement of air into and out of the lungs is called:

Which of the following can act as an antigen?

Which of the following affect the release of oxygen from hemoglobin?

Determine if the underlined portion of the statement is true or false. Measles can hang in the air and infect people for hours after an infected person has left the room.

Vaccination is an example of:

Interferons are a series of proteins that help other defense systems fight pathogens by harming their plasma membrane.