The second line of defense that leads to local capillary dilation and leukocyte infiltration is known as:
a. normal flora.
b. inflammatory response.
c. immune response.
d. humoral immunity.
ANS: B
The second line of defense is the inflammatory response. Inflammation is a local response to cellular injury or infection that includes capillary dilation and leukocyte infiltration. The immune response is the body's attempt to protect itself from foreign and harmful substances. Humoral immunity is an adaptive immunity and normal flora is a group of non-disease-causing microorganisms (e.g., bacteria, fungi, protozoa) that live in or on the body.
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