Exam 32: Innate Immunity

Interferon inhibits the spread of:

Many of the inflammation mediators act as chemotactic factors.

In phagocytosis, a footlike projection, called a phagosome, extends toward a microorganism.

Inflammation mediators include:

Name and describe the mechanical and chemical barriers of the nonspecific immune system.

What is a natural killer cell? Explain the functioning of a natural killer cell.

About 10% to 15% of all cells in any organ are phagocytes.

One reason for species resistance is the difference in molecules on the cell membrane of different species.

Which is the best explanation of how complement-a group of about 20 inactive enzymes in the plasma and on cell surfaces-is activated and produces cytolysis?

Pyrogens are produced only by body cells that have been infected by a virus.

Explain the inflammatory response; include the chemicals released and the characteristic signs.

The most numerous type of phagocyte is the macrophage.

Which of the following is not part of the inflammation response?

The ability of our immune system to attack abnormal or foreign cells but spare our own normal cells is called innate immunity.

Fever is always detrimental to the body and should be lowered as soon as possible.

Digestive enzymes and hydrogen peroxide are added to a phagosome to digest the phagocytized microorganism.

Complement is a group of about 8 different inactive enzymes circulating in the plasma.

Explain how a white blood cell ingests and destroys a microorganism.

There are almost 100 billion lymphocytes in the body's immune system.

Match each term with its corresponding definition. -Mechanisms that resist a variety of threatening agents or conditions