Unit 11 · Gas Exchange in Humans

Question Bank

Cambridge IGCSE Biology 0610 · 30 questions

Q15Gas Exchange in Humans

Which is NOT a feature of an efficient gas exchange surface?

(a)Large surface area

(b)Thin walls

(c)Good blood supply

(d)Thick layer of cells

Correct answer: (d) Thick layer of cells

Explanation: A thick layer would increase diffusion distance and slow exchange.

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