What protective role does the nose play in preventing infections?

What protective role does the nose play in preventing infections?

• A. It traps pathogens in nasal cavities
• B. It produces antibodies
• C. Hairs and mucus filter out pathogens and debris to stop pathogens entering our lungs
• D. It blocks pathogens with bone structures

Answer: (C)

The nose acts as a frontline defense by filtering and removing pathogens before they reach the lungs. Nasal hairs catch large particles, and the mucus coating traps microbes and debris. The cilia then move this mucus toward the throat to be swallowed or expelled, a process called mucociliary clearance. This mechanism, along with antimicrobial components in mucus, lowers the chance that pathogens get into the lower airways. So the protective role is best described as hairs and mucus filtering out pathogens and debris to stop pathogens entering our lungs.

The nose acts as a frontline defense by filtering and removing pathogens before they reach the lungs. Nasal hairs catch large particles, and the mucus coating traps microbes and debris. The cilia then move this mucus toward the throat to be swallowed or expelled, a process called mucociliary clearance. This mechanism, along with antimicrobial components in mucus, lowers the chance that pathogens get into the lower airways. So the protective role is best described as hairs and mucus filtering out pathogens and debris to stop pathogens entering our lungs.