BI-1012
Alveoli and gas exchange
Biology · Secondary 3 · Medium · Alveoli and gas exchange
Which statement correctly describes an adaptation of the alveoli for efficient gas exchange?
- They have thick walls to prevent oxygen from diffusing out.
- Their walls are one cell thick, providing a short diffusion distance.
- They have a small surface area to slow down gas exchange.
- They contain chloroplasts to release oxygen directly into blood.
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