The Eyes and the Respiratory Tract Are Both Protected Against

question 54

Multiple Choice

The eyes and the respiratory tract are both protected against infections by

• A) the mucous membranes that cover their surface.
• B) the secretion of complement proteins.
• C) the release of slightly alkaline secretions.
• D) the secretion of lysozyme onto their surfaces.
• E) interferons produced by immune cells.

---

Definitions:

NATO

The North Atlantic Treaty Organization is a military alliance formed for mutual defense against aggression, primarily established in 1949.

Marshall Plan

An American initiative passed in 1948 to aid Western Europe, in which the U.S. gave over $12 billion for economic recovery post-World War II to counter the spread of communism.

Truman Doctrine

A United States policy, announced by President Truman in 1947, to provide military and economic assistance to countries threatened by communism.