Which of the following is a nonspecific defense of the immune system?

Question

Quizplus · Accepted Answer

All four options listed (macrophages, natural killer cells, complement proteins, and cilia on the mucous membranes) are examples of nonspecific defenses of the immune system. Macrophages engulf and digest invading pathogens, natural killer cells attack virus-infected and cancerous cells, complement proteins can puncture holes in the membranes of bacteria, and cilia on mucous membranes physically trap and remove pathogens. All of these defenses act as a first line of defense against a wide range of potential pathogens, regardless of their specific nature.

Which of the Following Is a Nonspecific Defense of the Immune