One major type of defense used by the immune system is the non specific response. Which ofthe following statements best describes an example of a nonspecific response?A. The nasal passages contain mucus that helps protect the lungs from infectiousorganisms.B. the circulatory system transports antibodies that attack invading pathogenic antigens.C. the stomach is coated with a lining that helps prevent damage caused by ulcers.D. the lymphatic system produces particular cells that attack targeted pathogens.
The correct answer is A. The nasal passages contain mucus that helps protect the lungs from infectious organisms. This is a generalist barrier, therefore a universal mechanisms that might work against opportunistic pathogens.
