Factors which thicken the respiratory membrane may result in
a. oxygen deprivation
b. reduced pulmonary circulation
c. bronchiole constriction
d. none of the above

d. none of the above

Explanation:

The respiratory membrane is the membrane which separates the air inside the alveoli from the pulmonary capillaries. The types of respiratory membranes includes the alveoli membrane, the capillary membrane and the basement membrane. The respiratory membrane is usually very thin. But it becomes thick due to the increase in the fluid content, which actually forces the gases to diffuse through the membrane and the fluid. Also the pulmonary diseases can also cause the membrane to become thick.

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