Which of the following increases the rate of gas exchange across the respiratory membrane?
A)increased fluid in the alveoli
B)increased thickness of the respiratory membrane
C)increased surface area of the respiratory membrane
D)increased connective tissue in the alveolar wall
E)decreased surface area of the respiratory membrane

Question

Quizplus · Accepted Answer

Increased surface area of the respiratory membrane would increase the rate of gas exchange by allowing more area for diffusion to occur. Increased fluid in the alveoli would actually decrease the rate of gas exchange by creating a barrier between the gas and the respiratory membrane. Increased thickness of the respiratory membrane and increased connective tissue in the alveolar wall would also decrease the rate of gas exchange by making it more difficult for gas molecules to diffuse across the membrane. Decreased surface area of the respiratory membrane would also decrease the rate of gas exchange for the same reason as the previous options.

Which of the Following Increases the Rate of Gas Exchange