If the first lines of defense are penetrated by a disease-causing agent, the second line of defense will engage. Which are examples of the second line of defense? Choose all that apply.

A. Chemical barriers such as stomach acid
B. Physical barriers such as skin and mucous membranes
C. Inflammatory reaction
D. Natural killer (NK) cells


Answer:
C. Inflammatory reaction

D. Natural killer (NK) cells

Anatomy & Physiology

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