Gas exchange requires a surface that is both ________.
A)durable and stiff
B)protected within the body and connected to the circulatory system
C)thin and moist
D)permeable to oxygen and impermeable to carbon dioxide

Question

Quizplus · Accepted Answer

Gas exchange requires a surface that is thin and moist to allow for the diffusion of gases, such as oxygen and carbon dioxide, through the surface. A thicker, drier surface would be less efficient at facilitating gas exchange. However, the surface does not necessarily need to be protected within the body or connected to the circulatory system, or permeable to oxygen and impermeable to carbon dioxide. Durable and stiff surfaces may not be ideal for gas exchange as they may limit movement or flexibility.

Gas Exchange Requires a Surface That Is Both ________