Question

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

Options

• Allows oxygen from the air to enter the blood and carbon dioxide to leave the blood and enter the air.

• Can alter the pH by changing oxygen levels.

• Provides protection against some microorganisms by preventing their entry into the body and by removing them from respiratory surfaces.

• Allows for speech and sound generation.

Answer 1

Can alter the pH by changing oxygen levels.