Gas Exchange Quiz

Gas exchange occurs across surfaces such as the air/water interface, gas-permeable membranes, or biological membranes that form the boundary between the organism and its environment.

Small, unicellular organisms typically use their cell membrane as the gas exchange membrane due to their high surface-area to volume ratio.

Some small multicellular organisms, like flatworms, are able to perform sufficient gas exchange across their skin or cuticle that surrounds their bodies.

<p>An efficient gas exchange system is required to facilitate the exchange of gases between the interior of the cell(s) and the external environment, as gases are constantly consumed and produced by cellular and metabolic reactions.</p> Signup and view all the answers

<p>Most larger organisms use specialized structures with convoluted surfaces such as gills, pulmonary alveoli, and spongy mesophylls to provide the large area needed for effective gas exchange.</p> Signup and view all the answers