The human respiratory surface consists of
A) the walls of alveoli and pulmonary capillaries
B) the walls of alveoli and pulmonary capillaries and their basement membranes
C) the walls of bronchioles, alveoli, and capillaries
D) the walls of bronchioles, alveoli, capillaries, and their basement membranes
E) the walls of alveoli

Question

Quizplus · Accepted Answer

The human respiratory surface is the interface between the lungs and the blood, and it is where gas exchange occurs. This surface consists of the walls of alveoli and pulmonary capillaries, as well as their basement membranes. Therefore, option B is the best choice. Options A and E are incorrect because they do not mention the basement membranes. Option C is incorrect because it includes bronchioles, which are not directly involved in gas exchange. Option D is also incorrect because it includes bronchioles and their basement membranes, which are not part of the respiratory surface.

The Human Respiratory Surface Consists of