Single Answer MCQ
Q-00040069
The exchange of gases in the lungs is mainly facilitated by what mechanism?
1
Diffusion
2
Osmosis
3
Filtration
4
Active transport
Answer and Solution
Answer
A. Diffusion
Solution:
Gas exchange in the lungs occurs via diffusion, where oxygen enters the blood and carbon dioxide leaves based on concentration gradients. Osmosis refers to water movement, while filtration and active transport do not apply here.
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