Unit 11 · Gas Exchange in Humans

Question Bank

Cambridge IGCSE Biology 0610 · 30 questions

Q19Gas Exchange in Humans

Which statement best describes Cilia?

(a)A sheet of muscle below the lungs that contracts and flattens during inspiration.

(b)Tiny air sacs at the ends of bronchioles where gas exchange takes place.

(c)A surface where oxygen diffuses into and carbon dioxide diffuses out of the blood.

(d)Tiny hair-like structures on cells lining the airways that sweep mucus up and away from the lungs.

Correct answer: (d) Tiny hair-like structures on cells lining the airways that sweep mucus up and away from the lungs.

Explanation: Cilia: Tiny hair-like structures on cells lining the airways that sweep mucus up and away from the lungs.

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