Question

Which one of the below is not a function of the respiratory system?

• A. Allows oxygen from the air to enter the blood and carbon dioxide to leave the blood and enter the air.
• B. Can alter the pH by changing oxygen levels
• C. Provides protection against some microorganisms by preventing their entry into the body and by removing them from respiratory surfaces.
• D. Allows for speech and sound generation.

Answer 1

The correct option is C Provides protection against some microorganisms by preventing their entry into the body and by removing them from respiratory surfaces.

The function of the respiratory system.

1. Inhalation and Exhalation Are Pulmonary Ventilation—That’s Breathing
   
2. External Respiration Exchanges Gases Between the Lungs and the Bloodstream.
   
3. Internal Respiration Exchanges Gases Between the Bloodstream and Body Tissues.
   
4. Air Vibrating the Vocal Cords Creates Sound.
   
5. Olfaction, or Smelling, Is a Chemical Sensation.

So correct answer is C, Provides protection against some microorganisms by preventing their entry into the body and by removing them from respiratory surfaces.