Which of the following is an example of diffusion movement o

Which of the following is an example of diffusion?

movement of individual oxygen molecules from the air to the bloodstream.

transport of oxygen throughout the body via the circulatory system.

binding of oxygen to hemoglobin molecules within red blood cells.

movement of oxygen and other gases into and out of the lungs.

Solution

answer would be A) movement of individual oxygen molecules from the air to the bloodstream

As diffusion means flow of molecules from the region of higher concentration to lower concentration.

In the air oxygen concentration is more compared to bloodstream so oxygen in lungs moves from air to blood by diffusion (partial pressure ) .