Question

3. Which statement explains how gases are transferred through the alveoli?

As you inhale, carbon dioxide moves through the alveoli into the blood stream; as you exhale, oxygen moves from the blood through the alveoli and out the mouth and nose.

As you inhale, oxygen moves through the alveoli into the blood stream; as you exhale, carbon dioxide moves from the blood through the alveoli and out the mouth and nose.

As you inhale, carbon dioxide moves through the trachea into the blood stream; as you exhale, oxygen moves from the blood through the trachea and out the mouth and nose.

As you inhale, oxygen moves through the trachea into the blood stream; as you exhale, carbon dioxide moves from the blood through the trachea and out the mouth and nose.

Answer 1

Answer: 2nd Statement

Explanation: Firstly, The air you inhale has a high concentration of oxygen and the air you exhale is high in carbon dioxide this is why the 1st and the 3rd are wrong. Secondly, the air you inhaled in is diffused into the bloodstream through the walls of alveoli.

Hope this helps am sorry if i am wrong .