Respiratory System Quiz

They pull the diaphragm down to increase pressure.

They relax to allow the diaphragm to contract.

They have no role in the process of inhalation.

They contract, pulling the ribs up and out. (correct)

The intercostal muscles relax, allowing the ribcage to fall. (correct)

Oxygen diffuses from the blood into the alveoli.

Carbon dioxide diffuses from the alveoli into the blood.

The diaphragm contracts, increasing the chest cavity volume.

Oxygen diffuses into the blood from the alveoli. (correct)

Carbon dioxide enters the bloodstream from the alveoli.

Oxygen leaves the blood and enters the alveoli.

Both oxygen and carbon dioxide are expelled from the blood.

<p>It contracts, increasing volume and lowering pressure.</p> Signup and view all the answers

<p>To branch into smaller tubes called alveoli.</p> Signup and view all the answers