Mucus occurs in both the respiratory and digestive tracts.What is its main immunological function?
A)sweeping away debris
B)physically trapping pathogens
C)destruction of pathogens because it is acidic
D)increasing oxygen absorption

Question

Quizplus · Accepted Answer

The main immunological function of mucus is to physically trap pathogens in both the respiratory and digestive tracts. The slimy consistency and stickiness of mucus allow it to trap and immobilize bacteria, viruses, and other harmful substances before they can pass further into the body. The trapped pathogens can then be expelled by coughing or sneezing in the respiratory tract or eliminated through the digestive system.

Mucus Occurs in Both the Respiratory and Digestive Tracts