Question

Which of the following is NOT a function of the respiratory system?

A. provides a route for heat and water elimination

B. contributes to maintenance of normal acid-base balance

C. enables speech, singing, and other vocalization

D. obtain O2 from the outside air

E. transports O2 to the tissues via red blood cells

Answer 1

A)

Because you see respiratory system excretes small amounts of water but it is not significant and is not an important function of respiratory system.

All other statements are correct and may be you can be confused with option C. Let me explain

The upper respiratory tract involves larynx-the voice box. It plays a vital role in allowing air to pass through it while blocking foodķkò fluids from entering respiratory tract. It also has vocal folds which are responsible for sounds of speech and singing.