How the lungs are adapted for gas exchange 0.0 / 5 ? BiologyHuman, animal and plant physiologyASAQA Created by: emily_wCreated on: 18-11-14 12:33 What is the diameter of an alviolus? 100-300µm 1 of 9 How do the alvioli increase the exchange surface of the lungs? They are numerous and folded 2 of 9 What does squamous mean? Flattened 3 of 9 How thick are the walls of the capillaries and alvioli? One cell each 4 of 9 How far do gases have to diffuse to be exchanged in the lung? 1µm 5 of 9 How do squamous cells aid the lungs in gas exchange? They decrease the distance the gases have to diffuse across. 6 of 9 Why does a large surface area increase the efficiency of the lungs? More gas can be exchanged at the same time 7 of 9 Why must the lungs maintain the diffusion gradient? If the gradient is not maintained, diffusion will stop because the gases have reached equilibrium 8 of 9 How does the transport system maintain the diffusion gradient? Oxygenated blood cells are removed via the capillaries 9 of 9
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