At High Altitudes, Gases are Less Concentrated

Question

At high altitudes, gases are less concentrated. You may gasp for air, because
A)the surface area of your lungs will be decreased.
B)the amount of hemoglobin in your blood will decrease.
C)hemoglobin will not be able to bind to oxygen as well at a higher altitude.
D)the amount of oxygen that could diffuse into your blood will be decreased.

Accepted Answer

At high altitudes, the atmospheric pressure is lower, which means there is less oxygen available in the air. This results in a decreased amount of oxygen that can diffuse into the blood, leading to difficulty in breathing or gasping for air.