Unit 11 · Gas Exchange in Humans

Question Bank

Cambridge IGCSE Biology 0610 · 30 questions

Q18Gas Exchange in Humans

Which statement best describes Limewater?

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

(b)Muscles between the ribs that contract to move the ribcage up and out during inspiration.

(c)A solution that turns milky (cloudy) when carbon dioxide is bubbled through it.

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

Correct answer: (c) A solution that turns milky (cloudy) when carbon dioxide is bubbled through it.

Explanation: Limewater: A solution that turns milky (cloudy) when carbon dioxide is bubbled through it.

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