Which of the following is an example of diffusion?
A) Inhalation of air into the lungs
B) Build-up of carbon dioxide in the cells
C) Warming and moistening of inhaled air before it passes to the alveoli
D) Passage of oxygen from the alveoli to the blood

Question

Which of the following is an example of diffusion?​
A) ​Inhalation of air into the lungs
B) ​Build-up of carbon dioxide in the cells
C) ​Warming and moistening of inhaled air before it passes to the alveoli
D) ​Passage of oxygen from the alveoli to the blood

Quizplus · Accepted Answer

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. In this case, oxygen molecules move from the high concentration in the alveoli (air sacs in the lungs) to the lower concentration in the blood vessels surrounding the alveoli, which is an example of diffusion. The other options listed involve processes such as inhalation, respiration, or bodily functions that do not specifically involve the movement of molecules from high to low concentration, and therefore are not examples of diffusion.

Which of the Following Is an Example of Diffusion?​

Which of the Following Is an Example of Diffusion?