The body's first line of defense against the invasion of disease-causing microorganisms is ________.
A) phagocytes
B) natural killer cells
C) skin and mucous membranes
D) inflammatory response
E) fever

Question

Quizplus · Accepted Answer

The body's first line of defense against the invasion of disease-causing microorganisms is the physical and chemical barriers provided by the skin and mucous membranes. These barriers help to prevent the entry of foreign material, including microorganisms, into the body. Phagocytes and natural killer cells are part of the body's second line of defense, while the inflammatory response and fever are part of the third line of defense.

The Body's First Line of Defense Against the Invasion of Disease-Causing