QUESTION 24.1
Tobacoo smoke is inhaled into the lungs. Tar from the smoke is deposited in the lungs and this prevents
the lungs from working properly.
Which one of the following is a function of the lungs!
A) To pump oxygenated blood to all parts of your body
B) To transfer some of the oxygen that you breathe to your blood
C) To purify your blood by reducing the carbon dioxide content to zero
D) To convert carbon dioxide molecules into oxygen molecules.

D

Explanation:

The main function of the lungs is the process of gas exchange called respiration (or breathing). In respiration, oxygen from incoming air enters the blood, and carbon dioxide, a waste gas from the metabolism, leaves the blood.

Smoking can cause lung disease by damaging your airways and the small air sacs found in your lungs. Lung diseases caused by smoking include copd, which includes emphysema and chronic bronchitis. If you have asthma, tobacco smoke can trigger an attack or make an attack worse.

D) To convert carbon dioxide molecules into oxygen molecules.​