Exchange surfaceMediumQuestion 9283
Question
The moist nature of alveolar lining is important mainly because it:
- AAllows gases to dissolve before diffusionCorrect
- BPrevents haemoglobin formation
- CBlocks all CO2 movement
- DConverts oxygen into plasma proteins
Correct answer
Allows gases to dissolve before diffusion
Explanation
Respiratory gases dissolve in the moist lining before diffusing across membranes.