Question

What function do the alveoli perform?
1: Carry oxygenated blood away from the heart
2: Hold receptors for the sense of smell
3: Exchange oxygen in the blood for carbon dioxide in the air
4: Exchange oxygen in the air for carbon dioxide in the blood

Answers

GPT-4o mini
The correct function performed by the alveoli is:

4: Exchange oxygen in the air for carbon dioxide in the blood.

Alveoli are small air sacs in the lungs where gas exchange occurs; oxygen from the air passes into the bloodstream, and carbon dioxide from the blood is expelled into the air.